Malicious PDF — malware analysis report

Static analysis result for SHA-256 045d34b0c6c033b7…

MALICIOUS

PDF

100.7 KB Created: 2021-04-02 20:45:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: c5c1eb413b6f57f0c9263fc67c128934 SHA-1: d4dee014537e5356ae6dab67df14e4b8cbaf9b17 SHA-256: 045d34b0c6c033b702797686af6bcaecbcbbc8cc55e4d6bd823b1ae24b9c9edd
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 0.9994

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://jumiwimov.ru/strik?utm_term=the+company+of+wolves+full+movie PDF link annotation
    • http://hisgohar.site/19427267139j8or9.pdfIn PDF document text
    • http://allroadkamchatka.ru/does_percy_jackson_appear_in_the_son_of_neptunepzfv4.pdfIn PDF document text
    • http://rewita.fun/cobra_29_plus_manualpc3rv.pdfIn PDF document text
    • https://cdn.sqhk.co/sabeludejem/rdihRxy/monster_hunter_stories_arena_rewards.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416316/normal_5ff3b55d44b26.pdfIn PDF document text
    • https://sakotitalivuvu.weebly.com/uploads/1/3/4/8/134887700/cb290f3b.pdfIn PDF document text
    • https://sopaxibifezubin.weebly.com/uploads/1/3/4/6/134608036/fesoteko.pdfIn PDF document text
    • https://cdn.sqhk.co/gusisitixinu/hhgfQha/the_maxwell_nyc_check_out_time.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426967/normal_6050b5360f6b1.pdfIn PDF document text
    • https://cdn.sqhk.co/zebimapajod/gigjeih/biwesisozusunar.pdfIn PDF document text
    • https://cdn.sqhk.co/xalibolopov/2gjgcfO/gipejarak.pdfIn PDF document text
    • https://cdn.sqhk.co/jigitovewuk/1PnuicF/mineral_water_good_for_you.pdfIn PDF document text
    • http://jusapp.club/cdisc_adam_specifications_templatex5871.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379362/normal_6057047e4d9e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416132/normal_6066e74154891.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/feborobegibew/86780237.pdfIn PDF document text
    • https://8d94caac-80d5-4f6d-a73a-04ed47837dc1.filesusr.com/ugd/585b1d_d40dc8a7b7fd409b85bd512cfd1abdea.pdf?index=trueIn PDF document text
    • https://907864b8-ab38-4b43-b195-7646ee37c451.filesusr.com/ugd/c4b402_fee5b1f518be41a7a2212c094d6f7464.pdf?index=trueIn PDF document text
    • https://bb491b24-4c81-4ccc-8daa-bf1baeb171c2.filesusr.com/ugd/93c935_bb74a8b6626742e7b5160bce5a946134.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bisegilupuf/virgin_media_tv_guide_tonight.pdfIn PDF document text
    • https://171e2b11-24ea-4535-acac-f971ec821c4b.filesusr.com/ugd/a07927_0f9c0d9afee94f79a002c35cae1b0cc4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nigimul/2_fundamental_qualities_of_accounting_information.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000158c5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x158C5 24228 bytes
SHA-256: 8c3c69733dcd0b8e64ebf52bbb51a3739affc48796fe308bea3a5e50157bafc6
font_00_sfnt_off00011ff1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FF1 5360 bytes
SHA-256: 7d8522eba262d2050d46044ede2ac45d3ad8da401ef9051bfd6b60507267ef2b
font_01_sfnt_off0001322a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1322A 11264 bytes
SHA-256: 584ad312532b6beb41e0cb20b2c4afbe69fc6ce6060d7b8a9fc996b507188eee

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