Malicious PDF — malware analysis report

Static analysis result for SHA-256 014f6fdfed0836bf…

MALICIOUS

PDF

91.2 KB Created: 2021-03-22 10:38:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 7101c2b104b5efb2960456a59fd73a89 SHA-1: 9faa58b0e44b05b5f0d53ed12b3cf87ffb28a996 SHA-256: 014f6fdfed0836bfa0d3c117f87a7abc64f565b20fab8fd36213e8759433d7bd
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-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.
  • 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://botokaw.ru/aws?utm_term=verbal+reasoning+practice+questions+and+answers PDF link annotation
    • https://cdn.sqhk.co/wugolekufo/Ngfjiha/galukewokiwam.pdfIn PDF document text
    • http://collegegraduatecentraldating.com/where_is_the_lint_trap_on_my_maytag_washing_machine3uhgx.pdfIn PDF document text
    • https://cdn.sqhk.co/juvexafi/gcFie1n/kotazexamovim.pdfIn PDF document text
    • https://cdn.sqhk.co/baxorurifina/9gjic52/ualberta_library_proxy.pdfIn PDF document text
    • https://cdn.sqhk.co/dixejetafap/ddRqhhY/kuvuwikulifube.pdfIn PDF document text
    • http://prizyivnik.ru/17677897531io4sb.pdfIn PDF document text
    • http://trend-sales.fun/bridgedale_socks_size_guideynomq.pdfIn PDF document text
    • http://sport-stavki.fun/cyberpunk_2077_ps4_updatere0a8.pdfIn PDF document text
    • https://zazivepug.weebly.com/uploads/1/3/4/3/134359823/0c869f9595d74.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465559/normal_5ff19acd1e802.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370317/normal_5ff5bb4ad2aa5.pdfIn PDF document text
    • http://hellesypakk.online/xolomejavobikakopaliyf0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496824/normal_602103c8ab351.pdfIn PDF document text
    • https://cdn.sqhk.co/tuwesedujila/hbaqNgh/zombie_defense_hacked.pdfIn PDF document text
    • https://cdn.sqhk.co/nenuguvan/iaiahhh/58469312903.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372985/normal_60296f3f6fb70.pdfIn PDF document text
    • https://zarimuxeve.weebly.com/uploads/1/3/4/8/134897304/nuxikubojokezag.pdfIn PDF document text
    • https://cdn.sqhk.co/metexemoraga/LJjishe/yeezy_500_utility_black_release_date_2020.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0497493f-17aa-45f9-97fc-3bb001d42d5e/viguzetemamogu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70e2e5df-6b39-4495-ab08-1cc88be6d81e/fiwogisojokuvufifuro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09c4b4b8-b203-4285-9689-508a032c5e73/go_ask_alice_book_series.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_off00012476.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12476 5564 bytes
SHA-256: b8f0a227dfcf06264f550aeb5e1072c0462d4bcfbe349d507fc03c827bf336c7
font_01_sfnt_off00013775.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13775 11084 bytes
SHA-256: fcd3f392c3ebea1678bf75ff83a6341ee14cc53127494dcf4495686f773cc6df

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