Malicious PDF — malware analysis report

Static analysis result for SHA-256 e98787883da938d2…

MALICIOUS

PDF

73.5 KB Created: 2021-03-02 23:53:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 1bdb7bbbd8a8d12bf26050b3f76095cb SHA-1: b0e2d97e9544fb9bf6c59ea7e6957ff511736294 SHA-256: e98787883da938d2c09b9e5455333b45ad7d5c107d6dea71a4b95e798f6d4cc0
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 0.9996

Heuristics 6

  • 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 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://maypoin.ru/123?utm_term=greek+goddesses+names+female PDF link annotation
    • https://fobaripiso.weebly.com/uploads/1/3/4/4/134443650/5aa54c4c714e.pdfIn PDF document text
    • http://instacopyrighthelpteam.com/87844992041dc61n.pdfIn PDF document text
    • https://cdn.sqhk.co/jixavome/Oqxwhar/8475184847.pdfIn PDF document text
    • https://popibixa.weebly.com/uploads/1/3/4/7/134745137/fb8ab6b286dc660.pdfIn PDF document text
    • https://cdn.sqhk.co/nowonipewo/hiiih4Z/731286099.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475872/normal_60270d1a7e2fd.pdfIn PDF document text
    • https://nobewiga.weebly.com/uploads/1/3/5/3/135315034/dijewakibizoj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415068/normal_5fe3afe41babe.pdfIn PDF document text
    • http://ins.expert/wobujilleejw.pdfIn PDF document text
    • http://matcobzor.ru/cp_nht_android_9_cho_htc_u11pcjmo.pdfIn PDF document text
    • https://sanituwinera.weebly.com/uploads/1/3/1/3/131379206/8699790.pdfIn PDF document text
    • http://fherixq.com/psalm_23_v_5-6litvi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425768/normal_5fed370896437.pdfIn PDF document text
    • http://mmamba.ru/32283637812syq05.pdfIn PDF document text
    • https://cdn.sqhk.co/fodexuxefeba/ahiHXsA/53395534610.pdfIn PDF document text
    • https://zolivapodi.weebly.com/uploads/1/3/5/3/135313307/26a6e19fa46.pdfIn PDF document text
    • https://ratipixudaxixix.weebly.com/uploads/1/3/4/4/134472160/5429840.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468530/normal_603cbbbd9e6cb.pdfIn PDF document text
    • https://fesoviso.weebly.com/uploads/1/3/4/7/134710514/c1f45ad2345390.pdfIn PDF document text
    • https://daxixulo.weebly.com/uploads/1/3/1/0/131070202/77ab38d75f55.pdfIn PDF document text
    • http://alisabor.design/41000893672hly7b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459478/normal_600f38c81fa1b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e2ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2AD 5320 bytes
SHA-256: 6d773df102065fdc2e3c049eca65d11725d85e35622674d418821c66399e5685
font_01_sfnt_off0000f4bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4BC 10980 bytes
SHA-256: 8db4e34c0b3757207588585c37d052a596901b49e7abb37ca12395540ff4e501

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