Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d00b11186a1524e…

MALICIOUS

PDF

75.5 KB Created: 2021-03-09 17:33:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 92faf34a9c09e7aec11502332d8db5fb SHA-1: b3862a692cf4e1bad6143de779e6e26c3402f1f7 SHA-256: 9d00b11186a1524ea5e749a6aca580f2cb111527ec561379843670cd9a5c6ad4
194 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious sites. The presence of a 'download' button lure further supports a malicious intent, likely to distribute malware or conduct phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://maypoin.ru/wix?keyword=fake+sms+apk+pro PDF link annotation
    • https://cdn.sqhk.co/pevelefotuve/hgMhbHj/nasty_gal_shoe_size_guide.pdfIn PDF document text
    • http://tanijijud.sportsontheweb.net/side_effects_thyroid_hormone_replacement.pdfIn PDF document text
    • https://cdn.sqhk.co/fuwasokeg/hagejjT/doom_movie_cast_2016.pdfIn PDF document text
    • http://lamaded.mywebcommunity.org/mideraxa.pdfIn PDF document text
    • http://tugokutuli.scienceontheweb.net/titubivezixerolidakugod.pdfIn PDF document text
    • https://cdn.sqhk.co/nanagajog/fR21oie/car_crash_deaths_per_year_worldwide.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/povelenavuviw/shark_chatterbox_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00237ca1-8b10-4c04-91f8-1d58e9123ed1/47350173559.pdfIn PDF document text
    • https://6b54b0b2-91db-43cc-88c8-bbc4f7e20b37.filesusr.com/ugd/a773aa_eeec5f851f564fd2bf36c47ceec3fc84.pdf?index=trueIn PDF document text
    • http://roveramo.atwebpages.com/hewlett_packard_8600_printer_manual.pdfIn PDF document text
    • https://fb413987-6e77-4bf1-aaa6-e97eb550fbee.filesusr.com/ugd/108936_c4fd7f5484a3479783cbd8a83af70287.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d57128e-b708-488a-b527-44fc7ec2bfd4/fufoputazoziforave.pdfIn PDF document text
    • https://4ac36a2f-1533-488b-b282-cf34cdace458.filesusr.com/ugd/bcfc12_0db9622af76340b78adcb878fb5dfd95.pdf?index=trueIn PDF document text
    • https://da9d63b4-fbfd-4f6f-88e7-06ac0d76355b.filesusr.com/ugd/ca300b_e27ba40cff3f4937a158222c913628f2.pdf?index=trueIn PDF document text
    • https://6376acfe-5884-4251-b3d5-19a03c044549.filesusr.com/ugd/de3d83_2b70aaad2e234cad94c76fc11c68ba15.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1bac407-3804-431c-9029-f9dfda2af8f7/ap_human_geography_unit_1_vocabulary_list.pdfIn PDF document text
    • https://d52369c8-37f2-40d9-9d5f-d682b3b4a2e4.filesusr.com/ugd/6d5a7b_a53b2feed9b5496aa140a78fa5465a9d.pdf?index=trueIn PDF document text
    • https://ed59cdd8-0d75-4634-8bb2-7afdb9da103e.filesusr.com/ugd/9cb112_81fc9a8036f348dc8aac9e25e634bae1.pdf?index=trueIn PDF document text
    • https://a3e8d6b6-68ee-4625-a313-a25a09dbd39d.filesusr.com/ugd/312e12_dcef7a5f042741a5ae871bb6d07cc6ac.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zurovajij/meton.pdfIn PDF document text
    • https://1fa67a36-2e8b-44cc-a955-751d80433762.filesusr.com/ugd/d85e51_f84ab30a23ac403d8d38de76d354dbc0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/33a432b8-0824-4c66-8287-edb0367c9092/what_is_my_lg_tv_code.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE4 4952 bytes
SHA-256: 1bbea89211805dc87c21a141ddb7c4b664f29a9332dbf1d31c2a73e54b4c8358
font_01_sfnt_off0000fcae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCAE 10684 bytes
SHA-256: e312eded36b4a51c600e81e75358be0029026c39052edaedcfbcb998ef573cb8