Malicious PDF — malware analysis report

Static analysis result for SHA-256 70a103804bf574b7…

MALICIOUS

PDF

74.4 KB Created: 2021-01-11 09:59:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: a22a3ada24579fea34a4d62c2c695aaa SHA-1: 5a09e4aa40cc2309e0aa3922a1c5b8d27b4d9bc7 SHA-256: 70a103804bf574b71a6869005e0848d899d9f2e0424baf4d4595c215980ed96f
156 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 0.9998

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://trafftec.ru/aws?utm_term=cold-+rolled+grain-+oriented+sheet+steel PDF link annotation
    • https://tabofeluraratub.weebly.com/uploads/1/3/1/4/131438776/jowopesezomedepo.pdfIn PDF document text
    • https://sozatoma.weebly.com/uploads/1/3/4/4/134484551/kezomibalof_wikigegawudagu_wirev.pdfIn PDF document text
    • https://kuvikupomudu.weebly.com/uploads/1/3/4/4/134457818/mipidebajonik.pdfIn PDF document text
    • https://gesofomudejow.weebly.com/uploads/1/3/4/3/134344239/880347f898a.pdfIn PDF document text
    • https://cdn.sqhk.co/lusimalifa/gcgE1zx/12039861748.pdfIn PDF document text
    • https://jumuwubugunitus.weebly.com/uploads/1/3/1/0/131070493/063d5.pdfIn PDF document text
    • https://wiworixoso.weebly.com/uploads/1/3/4/3/134321663/9a9bdeda53.pdfIn PDF document text
    • https://fejovixojik.weebly.com/uploads/1/3/4/3/134333762/17e58f35f0.pdfIn PDF document text
    • https://latijazaw.weebly.com/uploads/1/3/4/3/134312978/siwobip.pdfIn PDF document text
    • https://rimesozarabef.weebly.com/uploads/1/3/1/6/131607712/zavababaxusi-vifuto-vobogiwev.pdfIn PDF document text
    • https://cdn.sqhk.co/xarozowuzosa/bhLhija/98533364190.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/jowutoneranemuk/98357294478.pdfIn PDF document text
    • https://s3.amazonaws.com/jusuberu/muse_web_design_software.pdfIn PDF document text
    • https://s3.amazonaws.com/suzixegazunow/braniff_airlines_uniform_designer.pdfIn PDF document text
    • https://s3.amazonaws.com/juzewojavomofew/frozen_invitation_card_maker_free.pdfIn PDF document text
    • https://s3.amazonaws.com/duzexefemosaxe/31007655562.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_off0000e213.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE213 5024 bytes
SHA-256: e642fa113f8909ad6f220ed0247763c72924245829585cff49f0fe192495b327
font_01_sfnt_off0000f31c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF31C 12756 bytes
SHA-256: 4b7b9adaa3ed93c93dbcacc6ff9bde26088acebaf85d2c0cdf8bdc35ae98fe9f

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