Malicious PDF — malware analysis report

Static analysis result for SHA-256 09038fbce9abbe07…

MALICIOUS

PDF

95.2 KB Created: 2021-03-18 17:21:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: acc0211c09c85278d0fab30c51b7191b SHA-1: 51f9ea24e14228e365648aca5f763a42fa6d1450 SHA-256: 09038fbce9abbe07b587cb91e708a59ffff454a82af6232e13f4e82a6b34fa2c
134 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. It uses an urgency-based lure. 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 0.9997

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://nipisod.ru/123?utm_term=stroke+guidelines+hemorrhagic+transformation PDF link annotation
    • https://cdn.sqhk.co/bodorosuzuta/j7mCp4F/67030248142.pdfIn PDF document text
    • http://tunabamilusi.mypressonline.com/very_simple_electric_guitar_songs_for_beginners.pdfIn PDF document text
    • http://wivaserana.mywebcommunity.org/ccna_dumps_download.pdfIn PDF document text
    • http://bexemusu.mypressonline.com/retawegudowuzuzujefedotop.pdfIn PDF document text
    • http://xorabawik.medianewsonline.com/56443163732.pdfIn PDF document text
    • https://fekugutupufug.weebly.com/uploads/1/3/4/8/134876907/jaxiwidulu.pdfIn PDF document text
    • https://cdn.sqhk.co/jizapamilizo/jhiGagh/dance_classes_for_adults_chicago.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449422/normal_602389bc4b81f.pdfIn PDF document text
    • http://ziwewixowele.sportsontheweb.net/luxagex.pdfIn PDF document text
    • https://kiparefewegapip.weebly.com/uploads/1/3/2/6/132682538/3319068.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468261/normal_603c86b671549.pdfIn PDF document text
    • https://cdn.sqhk.co/pubisifibuj/djb4igW/bdo_gathering_xp_guide.pdfIn PDF document text
    • http://mimowetoxizov.22web.org/how_to_reset_jabra_elite_sport_bluetooth_headset.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418185/normal_604671c8d7c34.pdfIn PDF document text
    • https://cdn.sqhk.co/borefigux/a5hjogg/black_deck_card_battle_g_gamehack.pdfIn PDF document text
    • https://vogaxuruxav.weebly.com/uploads/1/3/4/3/134352923/bd913ffc2.pdfIn PDF document text
    • https://gofadoden.weebly.com/uploads/1/3/4/6/134615513/7887518.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vifidumefitur.atwebpages.com/12170322106.pdfIn PDF document text
    • http://donakabaxes.epizy.com/41758313897.pdfIn PDF document text
    • http://xamilelamijokuk.rf.gd/jaxavuzavaba.pdfIn PDF document text
    • http://pepebejawu.epizy.com/bexudelativ.pdfIn PDF document text
    • http://murutasugotap.epizy.com/piwop.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_off000136ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136EA 5600 bytes
SHA-256: b43888e7d63493dca8eb251ff00c88c4e701ba310171ca08b6f5869ca87d2eba
font_01_sfnt_off000149ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149CE 11012 bytes
SHA-256: d8ae732ef72d7a9262882464bf38e2b6fa2459a71b99f2e6fbcfb11856a68ebd

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