Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ff726e9a32dba4c…

MALICIOUS

PDF

93.6 KB Created: 2021-03-17 20:29:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: cd48049f7987778c7d2ef1bd1a486b70 SHA-1: d4e82079cca1cc597b53b6764e199d8039fe791c SHA-256: 7ff726e9a32dba4cc9035015747e0939af7857f3c4afb14f03e2a362bc35506e
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 0.9983

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://jottigo.ru/wix?keyword=ikaw+lang+ang+iibigin+dec+22+2018 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4471464/normal_5fed76db31314.pdfIn PDF document text
    • https://cdn.sqhk.co/jasurisunav/cjjhbNh/97124762191.pdfIn PDF document text
    • https://cdn.sqhk.co/nisugavu/isihvjb/football_training_near_me_adults.pdfIn PDF document text
    • http://folibesawebowiv.22web.org/vejepitafugujebe.pdfIn PDF document text
    • http://bajoreto.sportsontheweb.net/1943256733.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371523/normal_5fd676e9f2029.pdfIn PDF document text
    • http://gopusoduj.mygamesonline.org/what_is_intransitive_verb_examples.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467007/normal_5fdc5f77d8039.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444095/normal_5ff542cfaf01b.pdfIn PDF document text
    • http://vudasuti.mygamesonline.org/banking_royal_commission_interim_report.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463808/normal_5fcafa252a149.pdfIn PDF document text
    • http://lagojituzolebuf.22web.org/strategic_asset_allocation_in_fixed_income_markets.pdfIn PDF document text
    • https://cdn.sqhk.co/pasededi/g6vNtzU/duminonemur.pdfIn PDF document text
    • http://xukilutu.22web.org/xaworamerefavamozolegoz.pdfIn PDF document text
    • http://bumawusuka.mypressonline.com/wugakod.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://desetezovadu.epizy.com/age_hardening.pdfIn PDF document text
    • http://vajubugi.epizy.com/jubulojusoge.pdfIn PDF document text
    • http://nepupiborama.rf.gd/accuplacer_advanced_algebra_and_functions.pdfIn PDF document text
    • http://wevujonixusenex.rf.gd/zunefik.pdfIn PDF document text
    • http://rugilunu.epizy.com/soxokijopigatevasukoleg.pdfIn PDF document text
    • http://begulazelukej.rf.gd/black_desert_online_sea_slow.pdfIn PDF document text
    • http://naxefugoxodikow.atwebpages.com/81535716613.pdfIn PDF document text
    • http://xujiwusa.epizy.com/kenexa_prove_it_accounting_test_answers.pdfIn PDF document text
    • http://bozudob.epizy.com/pisixonevemifamevatiz.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010aac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AAC 5588 bytes
SHA-256: ab9cf0c579a233f55099bc7175ce61451e7120b77b6d42196ef989f24102cefd
font_01_sfnt_off00011dd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DD4 4120 bytes
SHA-256: 51fce001d538d87f6efe90392e8030a3e62633aca6dbd03ef0a3877501e2e200
font_02_sfnt_off000128c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128C1 12168 bytes
SHA-256: 18457bd1a3ea7d272792296b275179ae22a527b77a568105f1f771c64ace599b
font_03_sfnt_off00015233.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15233 16388 bytes
SHA-256: 3ae6263da1b1671e5c512f34035eb7d6f7a49e17a4684ce2fab0496292f26474

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