Malicious PDF — malware analysis report

Static analysis result for SHA-256 69b61d3d110dcc39…

MALICIOUS

PDF

79.1 KB Created: 2021-02-28 09:31:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 176de0b6b27ea7a5e7e0f7d111c57949 SHA-1: d3cfa74201a8f8d8e18e6c5484b40bb71c8d9644 SHA-256: 69b61d3d110dcc391e697fd08f16ea7d993d0f23b5c494e67ea687659b0cd93f
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or spamming operation. One prominent URL, 'https://soxebez.ru/123?utm_term=best+online+roulette+strategy', is directly associated with the document's content, indicating a phishing or scam attempt. The ClamAV detection and ML classifier further support its malicious nature, likely as a phishing or trojan delivery mechanism.

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://soxebez.ru/123?utm_term=best+online+roulette+strategy PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4445125/normal_5fe87b13b5295.pdfIn PDF document text
    • https://sepikupi.weebly.com/uploads/1/3/0/7/130738949/9648891.pdfIn PDF document text
    • http://jiwapadenejeza.getenjoyment.net/gedoxetaxidupevapamowe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454545/normal_60148ade95186.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384645/normal_5ffc9ba4311fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368962/normal_5fdbc7255213b.pdfIn PDF document text
    • http://tur8osale.site/absolute_rc_heli_sim_hack_apknwf2n.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409107/normal_6038675f1dd6c.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://sutexuvidag.myartsonline.com/how_long_to_read_the_handmaids_tale.pdfIn PDF document text
    • https://s3.amazonaws.com/gekixadonuru/derimawugafewe.pdfIn PDF document text
    • https://s3.amazonaws.com/dazinibonofobi/newry_reporter_office_opening_times.pdfIn PDF document text
    • http://wugujub.onlinewebshop.net/98690971044.pdfIn PDF document text
    • http://gafodix.myartsonline.com/36428331410.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubatebedoxez/xetixowixunukore.pdfIn PDF document text
    • https://s3.amazonaws.com/sinamozagemoger/vexinijiwebifuve.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC02 4884 bytes
SHA-256: 7e613a145bad90405a99abd4c76c3d1c09ff1d607117a4bd151dfeace428d5e6
font_01_sfnt_off0000fcb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB3 10664 bytes
SHA-256: d5307fb465feef23232c420fc183295252bcead8d536537bd0d51dd68d2de54e
font_02_sfnt_off00012104.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12104 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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