Malicious PDF — malware analysis report

Static analysis result for SHA-256 0109b04869df0051…

MALICIOUS

PDF

78.4 KB Created: 2021-04-11 23:13:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5f92ab097dc43d00f341a2e805f4b61d SHA-1: 9f05a7e72d2b287e66984267eede079588068279 SHA-256: 0109b04869df00518624e21a74f205ee65f76483fd158f36dd287faf559d7db8
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://seumenha.ru/strik?utm_term=frigidaire+50+pint+dehumidifier PDF link annotation
    • http://fekopowogofeki.22web.org/96699119290.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500429/normal_5fc9aaed38fe4.pdfIn PDF document text
    • https://mijawogutudegi.weebly.com/uploads/1/3/4/3/134374589/dff7b34d166.pdfIn PDF document text
    • http://zabatipudug.iblogger.org/11832955207.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389095/normal_601cc2c7e6a0f.pdfIn PDF document text
    • https://serirufudo.weebly.com/uploads/1/3/4/7/134712976/tejifejenugu.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://0df6220b-9630-4647-aab6-0d9db69b9d59.filesusr.com/ugd/8b97dd_0df51cc17df3476eb0ca1c6599272ed2.pdf?index=trueIn PDF document text
    • http://nuzabasere.rf.gd/30147199874.pdfIn PDF document text
    • https://2ed9768e-82a7-41f7-bc91-4b86d8d7aa0f.filesusr.com/ugd/bdbd91_8e904fe3edc447f1a2f509493f7ec11f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/votuweroxigezog/cadence_aquecedor_410_manual.pdfIn PDF document text
    • https://4407eba0-147d-4e9d-98ff-19010b67f466.filesusr.com/ugd/c1f2fd_afdc9fd8e768413ba108531fd8d75eb6.pdf?index=trueIn PDF document text
    • https://926da24b-d3df-4aea-ac1b-ebdf7359a9e7.filesusr.com/ugd/fef925_1a8f00267abc4c62b12ade3054d84dd6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kasuwevovog/rejopusaxogoduxobulagemil.pdfIn PDF document text
    • https://s3.amazonaws.com/pivetuzadujo/25446659900.pdfIn PDF document text
    • https://s3.amazonaws.com/xajowu/nora_roberts_the_awakening_book_review.pdfIn PDF document text
    • http://wubojupegija.rf.gd/reglas_para_acentuar_palabras_agudas_graves_y_esdrujulas.pdfIn PDF document text
    • https://9e1b5e4e-b4ab-405b-8fdf-b3b6d7b19c28.filesusr.com/ugd/94ea38_dfde2aec81ad4436a6530e0f818b3bd8.pdf?index=trueIn PDF document text
    • https://2b4b9a66-705d-4e40-a31d-28d4db190467.filesusr.com/ugd/1dbb98_e92a2159a28a417bba822112e8b422c3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vavapekadoliti/55468025928.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e600.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE600 5240 bytes
SHA-256: 46f51ee2f18972e95538ccdf3b9898f0631e3cced11ced63e352234763e3c935
font_01_sfnt_off0000f79b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF79B 10864 bytes
SHA-256: a87516c58e1234cf64adb12cce34f78fab177590f939ea1f76f004be18c6bcf5
font_02_sfnt_off00011c94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C94 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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