Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0895609360a837b…

MALICIOUS

PDF

80.1 KB Created: 2020-12-28 17:31:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 02cec19492f36f894fcc08973576f1cc SHA-1: e670109b59db3d533b9047691bc7dbef48a54609 SHA-256: a0895609360a837b4275bb2de74cf8e9bb0051823c87373f66e8481d8e885c68
226 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a mass of external links, many hosted on disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The 'SE_PAYMENT_REDIRECT_LURE' heuristic indicates a likely business-email-compromise pattern, suggesting the document aims to trick users into changing payment details. The embedded links, such as 'https://traffnew.ru/aws?utm_term=bureau+labor+statistics+jobs+report', are likely part of a phishing or redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise 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://traffnew.ru/aws?utm_term=bureau+labor+statistics+jobs+report PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4393364/normal_5fc463a898442.pdfIn PDF document text
    • https://cdn.sqhk.co/momujolo/a48hbid/gubakesozuzapeta.pdfIn PDF document text
    • https://cdn.sqhk.co/kizofapekeku/VqrmOlE/real_racing_3_apk.pdfIn PDF document text
    • https://gajinuware.weebly.com/uploads/1/3/4/5/134597963/53ffe2c2bccfe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378613/normal_5f8a57cf2551a.pdfIn PDF document text
    • https://tukuboxux.weebly.com/uploads/1/3/4/5/134510407/a41c4390d.pdfIn PDF document text
    • https://cdn.sqhk.co/fovuxugo/4hcqhbN/khloe_kardashian_net_worth_2009.pdfIn PDF document text
    • https://cdn.sqhk.co/peferitukofa/autgiXV/57080113263.pdfIn PDF document text
    • https://sazalilo.weebly.com/uploads/1/3/4/5/134592982/a41e7041d6aec6.pdfIn PDF document text
    • https://lobevebuwavija.weebly.com/uploads/1/3/4/3/134394718/kodabogozoma.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://s3.amazonaws.com/jazofi/94728023319.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d30d06a7-3a3d-476f-8097-8c674d11b17a/how_long_u.pdfIn PDF document text
    • https://s3.amazonaws.com/leributafa/mcafee_antivirus_for_dell_laptop_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wujapu/18891709073.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_off0000ee65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE65 4968 bytes
SHA-256: 684a9f8036dc66ba9a04ceb38a60921bdd977bffb88ca787e2ef3eba38a74ad6
font_01_sfnt_off0000ff5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF5D 11140 bytes
SHA-256: 132c00c0f0b61eeaad4385c2b0771404fd7d5b9c716303d6c8c8d6c7f978f475
font_02_sfnt_off00012526.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12526 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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