Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fbfaafcdb4801e0…

MALICIOUS

PDF

98.8 KB Created: 2021-04-07 01:44:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3eab0e727402165b6efe50539ea17a58 SHA-1: 9ed0128de4d1b51cc0f555d32b455bd99870b6dd SHA-256: 5fbfaafcdb4801e002427f0c68348911de767255a1673ea014be89e2915f4623
186 Risk Score

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 0.9990

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://xajibur.ru/strik?utm_term=when+was+god+first+discovered PDF link annotation
    • https://magifoxokepo.weebly.com/uploads/1/3/6/0/136053300/zarujabe.pdfIn PDF document text
    • https://dujezipiver.weebly.com/uploads/1/3/4/6/134610991/6794444.pdfIn PDF document text
    • https://sufixekanol.weebly.com/uploads/1/3/4/7/134712322/tufamafo.pdfIn PDF document text
    • https://cdn.sqhk.co/janimivaxo/sYPghfD/genetics_and_information_transfer_lab_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/bulegumu/jig46hf/7643002033.pdfIn PDF document text
    • https://cdn.sqhk.co/noviraxat/g1zKahj/torukivigisutagupemiri.pdfIn PDF document text
    • https://xugimitedekilim.weebly.com/uploads/1/3/1/4/131482884/2787505.pdfIn PDF document text
    • https://kukefilatisila.weebly.com/uploads/1/3/4/4/134498126/rifazipifuf.pdfIn PDF document text
    • https://zeradukiw.weebly.com/uploads/1/3/4/8/134883462/junapejavimi.pdfIn PDF document text
    • http://fumuledijir.22web.org/statistics_formulas_with_examples.pdfIn PDF document text
    • https://tazuwadafif.weebly.com/uploads/1/3/4/8/134857375/90b8e8309.pdfIn PDF document text
    • https://wegupufula.weebly.com/uploads/1/3/0/8/130813429/tozete-rimaxig-wepidebuxe.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://6cbe2f5c-748b-4bc6-b691-25a968a47885.filesusr.com/ugd/d6b5da_85e534d91a2f4256813380311d436aac.pdf?index=trueIn PDF document text
    • https://f13dd0f9-fe0a-4257-a88d-d9af1a1cf0e3.filesusr.com/ugd/d954c5_862d338b3f7f4aafb03d9a41a93a2e7f.pdf?index=trueIn PDF document text
    • https://b19b3b79-9ae2-4e99-9b16-ef32671d60f4.filesusr.com/ugd/0bc867_1c325276114445cbb66191216285509f.pdf?index=trueIn PDF document text
    • https://64e18f06-8a0e-4dc1-8427-9dd81b4bff36.filesusr.com/ugd/baa514_ba79e38f19184dc0b8e7aa2141f01968.pdf?index=trueIn PDF document text
    • http://davidajepini.epizy.com/15045853661.pdfIn PDF document text
    • https://181f3bdf-810f-4c34-abb3-9f3362228cd6.filesusr.com/ugd/30415f_97b58731843a413b83aeda7a73c42451.pdf?index=trueIn PDF document text
    • https://d4f1f58f-bd44-402a-a4b0-a3aa01e36dbf.filesusr.com/ugd/dffefa_241d08d05b734c6fbf67deda3eeba6d6.pdf?index=trueIn PDF document text
    • http://benuvaf.rf.gd/how_long_does_wahl_clippers_take_to_charge.pdfIn PDF document text
    • https://510b81f6-be4e-4e40-9acf-3f60af495837.filesusr.com/ugd/5f226b_6111facfb21541d38765f1e5e4ad0493.pdf?index=trueIn PDF document text
    • https://1482387f-61d8-47e1-b538-9b7f1e8b89fb.filesusr.com/ugd/538d67_6db505edcd7041b8843758176f8889a3.pdf?index=trueIn PDF document text
    • https://6d428a25-da86-44fa-8f13-5b0f09742281.filesusr.com/ugd/3649d2_b96278d798f143269d8eef450be43080.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001390a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1390A 5204 bytes
SHA-256: 268bfae9eca68eaf45f6ae605fc077be3a6f969e2a3e631823497b9d21d83db9
font_01_sfnt_off00014ac9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14AC9 10748 bytes
SHA-256: b4cfdbcc68b1ca12284ccd383a0b4740533da90d7bde2d56123bd6424832a2fa
font_02_sfnt_off00016fa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16FA6 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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