Malicious PDF — malware analysis report

Static analysis result for SHA-256 13798011fb77fb17…

MALICIOUS

PDF

106.7 KB Created: 2021-03-26 08:41:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 9e72e7113f1a2b0c7c4ead6de6a497de SHA-1: ca6c699d09185279d09fb9aa7f9add3bab990102 SHA-256: 13798011fb77fb1767710e629cd57a6839e65c4436f3649a3a56f620e5aec376
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9816

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://fokemale.ru/123?utm_term=math+cheat+sheet+creator PDF link annotation
    • https://kaxuzuditad.weebly.com/uploads/1/3/5/3/135310968/6778131.pdfIn PDF document text
    • https://tojaxufuvubugo.weebly.com/uploads/1/3/4/6/134641466/tebonesurureb.pdfIn PDF document text
    • https://rezawefid.weebly.com/uploads/1/3/5/9/135978206/e2f85c092a3c91.pdfIn PDF document text
    • https://pexulowiseguwuz.weebly.com/uploads/1/3/4/3/134391342/7084ca3837433d.pdfIn PDF document text
    • https://pigegiwoxare.weebly.com/uploads/1/3/5/3/135385020/leperesezapoxeja.pdfIn PDF document text
    • http://fodefon.getenjoyment.net/bsac_endocarditis.pdfIn PDF document text
    • http://dawexefif.getenjoyment.net/emperor_jones_records.pdfIn PDF document text
    • https://pegugaxuxidugif.weebly.com/uploads/1/3/1/1/131164321/8eace8dfee09.pdfIn PDF document text
    • http://zijozarub.mygamesonline.org/old_dolls_houses_for_sale_on_ebay.pdfIn PDF document text
    • https://jufavufopu.weebly.com/uploads/1/3/4/3/134340263/8b6a1f6.pdfIn PDF document text
    • http://majikok.mygamesonline.org/ave_maria_gounod_violino.pdfIn PDF document text
    • https://dukupifit.weebly.com/uploads/1/3/0/7/130775427/9473924.pdfIn PDF document text
    • https://kojegowi.weebly.com/uploads/1/3/4/6/134685768/208676.pdfIn PDF document text
    • https://relodigiluburem.weebly.com/uploads/1/3/2/6/132681887/622babaa54.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://780c8f77-0f51-49ab-8dd1-60a90eb210a4.filesusr.com/ugd/1b8612_2db3b62827a74eb996198e2d18bfb73a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd77feeb-2dd5-4c6c-be48-4234d7a855e2/somuxebanisorulowakefiwan.pdfIn PDF document text
    • https://7a3463bf-3117-47cc-940f-ad9d50d05675.filesusr.com/ugd/9f2514_f3d2a52d693745a989002facc41eb9f8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/forupokisip/aashiqui_2_hd_video_songs_pagalworld._com.pdfIn PDF document text
    • https://s3.amazonaws.com/pazerogasarinu/blank_certificate_of_recognition_templates.pdfIn PDF document text
    • https://c63ca81c-6df4-4ec3-bc2e-8508f29a6879.filesusr.com/ugd/d48fe3_4cdc23de2455454dbf8f9004f21767cf.pdf?index=trueIn PDF document text
    • https://b147a2f3-58af-4013-9def-597e86e94513.filesusr.com/ugd/47d6bb_f426863230a448ee872a7a1b5cd4bc24.pdf?index=trueIn PDF document text
    • http://lazoxiro.onlinewebshop.net/95707638506.pdfIn PDF document text
    • https://b354d503-40d1-4c97-84b4-bc0b16c12f35.filesusr.com/ugd/8c7d07_128f1f09a0d34825b36eecc674e79c65.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/838f9b92-6c86-4107-8589-2295fd5b1afb/the_south_and_west_transformed_test_a.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/586fd7a0-bfa2-4e5f-b6c6-2fb49c1e3060/fidorikinufifuva.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_009_off00017d10.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x17D10 18540 bytes
SHA-256: 0985b4b588d2439c9d5fc81013ab0bb9ffe7cfe4a105c49bd4140e700a95cf40
font_00_sfnt_off0000fbb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB9 7880 bytes
SHA-256: 52d9eb0306f41e7c69c977d2e161aea3aca58514ce59ba6bd03f234d2a5e1955
font_01_sfnt_off00010fe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FE3 6312 bytes
SHA-256: b7f74c8e752d0dd7649b5cdd05c16ea2cc82793ba005702330317c976714eadc
font_02_sfnt_off000125c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125C4 4860 bytes
SHA-256: 521d3e2b9b79bdbc4a24babf9acd989ae3f9f1110e1a6a0513b6230ca05e7aff
font_03_sfnt_off00013640.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13640 6148 bytes
SHA-256: 0b8363bc9e07cf89205331d27bc1c31e4fc91592bb846ce71245372e642e4983
font_04_sfnt_off00014618.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14618 1800 bytes
SHA-256: 6d2a3a16cc464ce72cf05976c7f96a31c93af2202e0dc760c37a694345e222ee
font_05_sfnt_off00014ea8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EA8 15768 bytes
SHA-256: 20ba309a700cc38f280e52e04431552f04c280a3702af68eab2cb50feabd1a98

Open this report in the interactive analyzer, or submit your own file for analysis.