Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8651b9f90830de9…

MALICIOUS

PDF

71.8 KB Created: 2021-01-10 00:02:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: a1983d8a14796737eb68f4bf5a2dadd0 SHA-1: b6e111c169ec8131ab6e6f985b325ffda6935d57 SHA-256: e8651b9f90830de972f049f6ba8f209aead076295059998ed25af37dd01bae85
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 0.9998

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://traffnew.ru/123?utm_term=cvs+wrist+blood+pressure+monitor+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4493195/normal_5fd644e9548a2.pdfIn PDF document text
    • https://site-1211564.mozfiles.com/files/1211564/drag_racing_club_wars_mod_apk_money.pdfIn PDF document text
    • https://site-1174422.mozfiles.com/files/1174422/amazed_meaning_in_tagalog.pdfIn PDF document text
    • https://site-1180490.mozfiles.com/files/1180490/47424954598.pdfIn PDF document text
    • https://lolijejolo.weebly.com/uploads/1/3/4/4/134442146/d7b751855.pdfIn PDF document text
    • https://rosuxemu.weebly.com/uploads/1/3/0/7/130776582/37652f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466143/normal_5fc0575f91c55.pdfIn PDF document text
    • https://pidadilux.weebly.com/uploads/1/3/4/6/134666204/gezumuwavizegekis.pdfIn PDF document text
    • https://xomijati.weebly.com/uploads/1/3/5/3/135329577/suravolulenuko-zijeva-gonupemef-kujipux.pdfIn PDF document text
    • https://site-1177689.mozfiles.com/files/1177689/mugixali.pdfIn PDF document text
    • https://bizavurodetilu.weebly.com/uploads/1/3/4/3/134391156/xatigorilomuda_morebadawop_jasoduv.pdfIn PDF document text
    • https://site-1168360.mozfiles.com/files/1168360/911_prank_call_simulator.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/nezanurugega/nizekutozuk.pdfIn PDF document text
    • https://s3.amazonaws.com/daxemo/modeling_anaerobic_digestion.pdfIn PDF document text
    • https://s3.amazonaws.com/jijumupade/i_the_supreme_augusto_roa_bastos.pdfIn PDF document text
    • https://s3.amazonaws.com/tikofaketonub/laluguk.pdfIn PDF document text
    • https://s3.amazonaws.com/sibenuvokiwuz/diamondback_tile_saw_harbor_freight.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbe6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBE6 5300 bytes
SHA-256: e211e33c8d815381eeb700e020ab928b43a51f2d1ff1b4b9981931e1114cc918
font_01_sfnt_off0000eddb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDDB 10704 bytes
SHA-256: 4b13e106bd8b898fb829b1e3a3c87e3e3363fe4d6b65b69edea905df95685120

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