Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bb0ae3dabddd6d4…

MALICIOUS

PDF

72.1 KB Created: 2021-05-27 21:46:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5a758601a42fbb1435978489238a2c55 SHA-1: 4b16298e849cf3ffb48534a2bd843cb554e5fdc8 SHA-256: 7bb0ae3dabddd6d4a4a6bc76e5a21bd8013474a44f00bd2a83c78a82385b79fa
186 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 6

  • 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.
  • 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://golowaki.ru/123?utm_term=biblia+de+estudio+macarthur+en+pdf PDF link annotation
    • https://dujisiseruw.weebly.com/uploads/1/3/0/7/130776106/sisaz-pagokiwigola.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387698/normal_60289941a34fe.pdfIn PDF document text
    • https://xevekefipozi.weebly.com/uploads/1/3/1/4/131406281/2968935.pdfIn PDF document text
    • https://ligenoleka.weebly.com/uploads/1/3/4/4/134496601/a908f3926.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414696/normal_5fe517df40890.pdfIn PDF document text
    • https://sewusadata.weebly.com/uploads/1/3/5/4/135401056/kegirevew-deripuxifemebof-mufefam-kunobofom.pdfIn PDF document text
    • https://dakuwenodamemu.weebly.com/uploads/1/3/5/3/135312817/31b981c272ed4.pdfIn PDF document text
    • https://fowulovelop.weebly.com/uploads/1/3/4/4/134468794/xogopelumez.pdfIn PDF document text
    • https://gonaxazurunuta.weebly.com/uploads/1/3/0/7/130739517/d3e146019f39c36.pdfIn PDF document text
    • https://xukewefesuf.weebly.com/uploads/1/3/4/7/134743763/6350196.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427783/normal_6017c7fdb50e9.pdfIn PDF document text
    • https://kuvegegujumil.weebly.com/uploads/1/3/4/3/134367432/mudufeponazuguf_memafevi_nozazedo_vukuduzana.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fd2f195-c889-4cd8-ab0c-c291d25eb01e/35929122147.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b1f7f62-a7d3-443d-83f9-5fa67cf2348d/17414371440.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd56caa8-da0a-4659-91f1-6fbb7b217da9/tree_of_life_tattoo_wrist.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe8a1c0d-fc50-4192-9c8c-a477a6db1d6c/starcraft_2_cheats_not_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/353f3367-c855-499d-b2f5-ffa717805b0b/how_to_pair_lg_aptx_headset.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_off0000d8bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8BD 5584 bytes
SHA-256: 81aa95f2cee65c5bc05f55703b173c3c77e5e6187720337ef59b5a01073ddbbe
font_01_sfnt_off0000eb8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB8A 11688 bytes
SHA-256: 228619e227bb077b56d44f5afc7ca4b5f6d40ffb9deef50853e8f3f25ba6652a

Open this report in the interactive analyzer, or submit your own file for analysis.