Malicious PDF — malware analysis report

Static analysis result for SHA-256 266c879375ecfed4…

MALICIOUS

PDF

84.2 KB Created: 2021-06-10 09:31:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 9c9ce08e32c85bce418222c51a5da5ef SHA-1: 2877a285522b3ac290c358fe38ca4cf173ccd0d9 SHA-256: 266c879375ecfed44986b1d133dc8c4e457340ff11264ac01c2a7ad49d47ca19
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are to disposable hosting services, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded URLs are likely used to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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.
  • 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://philabc.ru/pbw?utm_term=official+sat+math+2+practice+test PDF link annotation
    • https://dapijapivabug.weebly.com/uploads/1/3/4/3/134338952/witozej.pdfIn PDF document text
    • https://vikisoxez.weebly.com/uploads/1/3/4/7/134712259/wuvunetukovosenuru.pdfIn PDF document text
    • https://saduzuwaz.weebly.com/uploads/1/3/4/5/134599146/wupelutugawade.pdfIn PDF document text
    • https://fejumarawa.weebly.com/uploads/1/3/4/6/134611790/jomirak.pdfIn PDF document text
    • https://buvujufa.weebly.com/uploads/1/3/1/3/131379824/torekolojopuxokovuni.pdfIn PDF document text
    • https://lalonofinesuver.weebly.com/uploads/1/3/4/4/134442061/8a3b7f9dddfec.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/a3000970-dd0e-4d56-9d1f-94ead421be12/34929417828.pdfIn PDF document text
    • http://subazim.pbworks.com/f/fairy_tail_episode_51_english_sub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/169b353f-e6e1-4067-9555-01c715a033f2/everything_pachislo_manual.pdfIn PDF document text
    • http://gazumadu.pbworks.com/f/56106660899.pdfIn PDF document text
    • http://mupalunava.pbworks.com/f/82383074037.pdfIn PDF document text
    • http://japakekuwita.pbworks.com/w/file/fetch/144917982/bully_game_apk_download.pdfIn PDF document text
    • http://xujefix.pbworks.com/w/file/fetch/144576621/teorias_de_la_personalidad_duane_p._schultz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ceaee70c-f1d0-4362-8396-c7363f51a50d/65000002526.pdfIn PDF document text
    • http://fulusivijomu.pbworks.com/f/angry_birds_2_old_version_apk_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a78716d3-2cd4-4a9b-9320-248f92376674/faworojobenakebokem.pdfIn PDF document text
    • http://xumefosux.pbworks.com/w/file/fetch/144814905/saketuxadinurutorerunukov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65057134-1453-436d-bd8b-a0f0e2d3b2d1/48274554399.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dccc99b0-107e-48a5-a17b-e450cc22a155/rupobaferuporarijaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39d4a5d2-1692-4f5b-851a-73d151da7059/dowux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4904bb1f-1c39-4a97-98e6-214d74df93f6/tekezapedibigenomilo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f8c7d7a-8d97-430d-996a-23d32c6be076/malcolm_x_speech_the_ballot_or_the_bullet_analysis.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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e753.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE753 4988 bytes
SHA-256: fe99cbcd6b3d5cfefc7a8e441f4ea1b794d9259f5d6b53e43c153d58eea3e339
font_01_sfnt_off0000f847.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF847 11040 bytes
SHA-256: fa09f615d0dd330bcb621ca06d320f947e4791469fbc0b8b36a1df84be556476
font_02_sfnt_off00011e2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E2A 16072 bytes
SHA-256: 062f8a7185608a18dbd56baf48eb14c791e3c6ea8866a2ddd6a03467109098f1
font_03_sfnt_off000132c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132C9 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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