Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba86e7f57260edd6…

MALICIOUS

PDF

83.3 KB Created: 2021-03-28 17:25:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: f7aebace51a76334c3a4614dd880e4fc SHA-1: 199931e5d3efe406e34d82c91a6ef0918a418682 SHA-256: ba86e7f57260edd6b5a4026b1ff7be453eae9600b54352f1237eb653eaba580d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dafemum.ru/wix?keyword=gw-m5610bc-1jf+made+in+japan PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4497372/normal_60125016f1c64.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460241/normal_5fe53bfcd8492.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386074/normal_602a2edd497ed.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365583/normal_60055679dc49f.pdfIn PDF document text
    • http://rakodunugi.iblogger.org/83983422613.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477877/normal_6058c5bd4b8a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413223/normal_605bdd29e7663.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390371/normal_5feb65366664b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496592/normal_5ffa50a37c74b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404990/normal_604196b08057c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459640/normal_5ffe6fe4c91af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4528780/normal_5fd8278642372.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
    • http://lejopuluke.rf.gd/91623169747.pdfIn PDF document text
    • http://pabipinipimano.epizy.com/wumisaxefotiwijamoras.pdfIn PDF document text
    • http://magijet.epizy.com/how_to_set_casio_illuminator_watch_time.pdfIn PDF document text
    • https://s3.amazonaws.com/dinisemowoge/jasonupexinawagesekif.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwuxot/wizedifaf.pdfIn PDF document text
    • http://loratozojakin.epizy.com/approach_song_video_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubatebedoxez/broadlink_rm_mini_3_guide.pdfIn PDF document text
    • http://fobajoruvibu.epizy.com/police_report_search_california.pdfIn PDF document text
    • http://potopaf.epizy.com/mevamomidiwes.pdfIn PDF document text
    • https://s3.amazonaws.com/laginekux/epson_surecolor_p8000_price.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eeda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEDA 2912 bytes
SHA-256: 4a4d5aa4e18607ad9b38bc079dd559aafbd0d5a701b98dff36764d410c746823
font_01_sfnt_off0000f940.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF940 5436 bytes
SHA-256: 29367f2b88a60424da3ae6bf783294d9238be9c62958aa88021108289b0e8e0d
font_02_sfnt_off00010bbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BBC 10504 bytes
SHA-256: b2d9fab8b6eb6901fc862a6905a6b5e781754b5ea31718072c16d4a2149b2f19
font_03_sfnt_off00012fcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FCF 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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