Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa2fed309c0c87c8…

MALICIOUS

PDF

86.1 KB Created: 2021-05-03 20:40:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 8b12c3044e9ddc5d6a9cd80a8c27224a SHA-1: 5398c787a9ba17b6e6b0be03749b55883bc808e8 SHA-256: fa2fed309c0c87c83d90920ea895c28ce95b13e70411e18a9d394e07c104ed2a
156 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 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://kuzutuzo.ru/strik?utm_term=how+much+is+a+route+44+drink+at+sonic PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4383170/normal_5fdc09f2c92b0.pdfIn PDF document text
    • http://onsideball.info/wisupebt7n94.pdfIn PDF document text
    • http://itfamily.info/75694229364tb8jf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392439/normal_6002b146d5553.pdfIn PDF document text
    • http://dream-stat.ru/kakupomurotemijekiloz35fc7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470391/normal_5fd7dc6fb3c8c.pdfIn PDF document text
    • http://brumbum3.xyz/afadhali_yesu_audio58bez.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gekojulog/pinuwujof.pdfIn PDF document text
    • https://s3.amazonaws.com/tikoweravisixu/65101316962.pdfIn PDF document text
    • https://8eccd3b7-fb20-4588-a5b5-4d8c58591879.filesusr.com/ugd/0e6328_b61b19198d884ed2bbcb9f33f2587442.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zuxime/wanadozunusox.pdfIn PDF document text
    • https://1c2b20db-dbe1-4299-b4c0-f67d595d3b6c.filesusr.com/ugd/e71423_d839ee462da04f0fa41fc0889a99fec2.pdf?index=trueIn PDF document text
    • https://1a413096-4115-453c-84a6-e19f3d0a1e7a.filesusr.com/ugd/4a2d03_570c328752714c31ab32b0ffc9812ebb.pdf?index=trueIn PDF document text
    • https://b9eb3541-094c-4606-b101-17c2291fd6e1.filesusr.com/ugd/a18601_44b357f679414a27b5b0ad57f3a766af.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nawosineromigi/mujufu.pdfIn PDF document text
    • https://8ac5c8e1-9174-427d-95c2-90bebb9f105a.filesusr.com/ugd/44b221_9f43e16a23514b818b46cdf6f43257ff.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/panokojol/21394605620.pdfIn PDF document text
    • https://s3.amazonaws.com/piwupevivotixi/bonetrousle_sheet_music_cello.pdfIn PDF document text
    • https://s3.amazonaws.com/zulezov/72773586539.pdfIn PDF document text
    • https://0eaabcdb-938a-45a6-85a3-1a7d796bbcdd.filesusr.com/ugd/8d6d25_96f7e6b68c9f44b9a8f783a11205f116.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rurosaveruk/12993979022.pdfIn PDF document text
    • https://03df74f7-894d-4c84-999e-da2b33eb06f5.filesusr.com/ugd/4c7733_cab7f53859d545ffaa5a391616d275a4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bulujono/pitch_class_set_calculator.pdfIn PDF document text
    • https://1fc3e790-19e1-43b7-bae7-d09a953f51fe.filesusr.com/ugd/2c608b_e67ff22bba2549fb967132e4794aeb2d.pdf?index=trueIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011290.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11290 5352 bytes
SHA-256: 353ac4449683c53545fb3d082e19f2ffdb9e6bc1b0b2a48395c3ec9793c08993
font_01_sfnt_off000124af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124AF 11276 bytes
SHA-256: 4885d0c9b0772e7968f699dc694aa7da189053bdb36037e16249dab3e95dbad1

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