Malicious PDF — malware analysis report

Static analysis result for SHA-256 d06107ab87781c10…

MALICIOUS

PDF

75.9 KB Created: 2021-02-22 13:52:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 3fe09b80ef6f2e8a38831cb47eb4260d SHA-1: 540e087b3ed569050f4191b052c2fb913c90f68f SHA-256: d06107ab87781c108a5e64687a2bda22cd4c2eef3cfd94c72d637e2436cd458b
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 0.9998

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 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://baarspo.ru/123?utm_term=seiko+solar+chronograph+v172-0an0+manual PDF link annotation
    • http://optarfes.com/4691128947706unh.pdfIn PDF document text
    • http://hisgohar.site/balisiwuwetuzerasileginl6exk.pdfIn PDF document text
    • http://zawubitukete.22web.org/28014891944.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484834/normal_601c7bcf6c2b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393901/normal_600df037f1ea4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4530171/normal_60312ef45f3ee.pdfIn PDF document text
    • https://cdn.sqhk.co/sogefuluf/hjWVU3X/lomifu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381551/normal_602c90c98e954.pdfIn PDF document text
    • https://cdn.sqhk.co/leporolino/GUhejfR/second_hand_clothes_uk_wholesale.pdfIn PDF document text
    • http://5-euro.info/casio_ctk-7000_price_in_indiajux5d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fufabufitilaf.epizy.com/is_krav_maga_dangerous.pdfIn PDF document text
    • http://togalufunepobaz.rf.gd/horseshoe_lake_arizona_fishing_report.pdfIn PDF document text
    • http://lofoxos.epizy.com/the_long_way_to_a_small_angry_planet.pdfIn PDF document text
    • http://mibexaluji.epizy.com/when_does_apple_report_earnings.pdfIn PDF document text
    • http://zasegusof.epizy.com/96638977099.pdfIn PDF document text
    • http://gikutixutawax.epizy.com/que_es_el_materialismo_filosofico.pdfIn PDF document text
    • http://ruvesigokusi.epizy.com/simubomomugexadoz.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_off0000e8b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B5 6012 bytes
SHA-256: 16540b9331bee1233ba6bcbe7ef6aabcf0cb479b3e857e827a917b27c9ca39ee
font_01_sfnt_off0000fd24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD24 11004 bytes
SHA-256: ad49e0213af044237cf20a1e06c638318bd69ba7c414ac1b0f16276b52676d74

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