Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e1ea94ad848ee19…

MALICIOUS

PDF

75.7 KB Created: 2021-03-18 19:58:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 24eacbbc7e85da185890cbb12807115e SHA-1: d7d3feb6a527e5af6af09ad7712358f60d028820 SHA-256: 8e1ea94ad848ee1954a801007da33decbba6018dac32ca2a30dca87fd3eea6fb
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 0.9997

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://dafemum.ru/wix?keyword=define+loading+dose+and+maintenance+dose PDF link annotation
    • http://pigigozoruda.mypressonline.com/27948187595.pdfIn PDF document text
    • http://vashe-zdorovie.xyz/canto_de_aves_del_uruguay4sbiq.pdfIn PDF document text
    • https://kivogumit.weebly.com/uploads/1/3/1/0/131070776/gelakutiviru.pdfIn PDF document text
    • http://vvd.bar/wolitifaleor2kg.pdfIn PDF document text
    • http://damvglaz0.xyz/51255572702v8s2d.pdfIn PDF document text
    • http://tezuveripoxub.mypressonline.com/wunorowe.pdfIn PDF document text
    • https://jupavovol.weebly.com/uploads/1/3/4/3/134314217/dapadarolebasixamik.pdfIn PDF document text
    • https://vipobonufemug.weebly.com/uploads/1/3/5/4/135401160/weruwovizunu.pdfIn PDF document text
    • http://studyweb.site/7412159984097473.pdfIn PDF document text
    • http://zemegazi.22web.org/weekly_calendar_cute.pdfIn PDF document text
    • http://yourbigdick.space/increment_sheet_reference_excela141e.pdfIn PDF document text
    • https://tupipukevoluda.weebly.com/uploads/1/3/4/0/134041298/takuvidub.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/difigomisosak/stihl_ms170_chain_size.pdfIn PDF document text
    • https://s3.amazonaws.com/tibitexil/95996557761.pdfIn PDF document text
    • https://s3.amazonaws.com/juwofuxufijup/gonugaromobasazu.pdfIn PDF document text
    • https://s3.amazonaws.com/pafexegud/riwixesu.pdfIn PDF document text
    • https://s3.amazonaws.com/rorives/adekunle_before_you_wake_up_remix.pdfIn PDF document text
    • http://jilerixam.epizy.com/latesepifasunomote.pdfIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/fujitsu_fi-_7160_scanner_datasheet.pdfIn PDF document text
    • http://kotidaw.epizy.com/21082953618.pdfIn PDF document text
    • https://s3.amazonaws.com/jajuzasalikirut/maplestory_ludi_pq_math_answers.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_off0000e865.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE865 5244 bytes
SHA-256: db352b29a5bc1d643909a02e413a05d03515979f592e42564c4a33bedbbec2ff
font_01_sfnt_off0000fa3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA3E 10968 bytes
SHA-256: 1920e5a43cbaee344fe069efe100b0176af48a421065ea6f2ab60f5c9fd3181b

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