Malicious PDF — malware analysis report

Static analysis result for SHA-256 54b6f88e9c83103f…

MALICIOUS

PDF

90.9 KB Created: 2021-03-25 13:44:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0bc85d565258699b19fd8887c85b21a7 SHA-1: 5ef9de2905e9e461a07446171e583f115653d282 SHA-256: 54b6f88e9c83103fc289944faa5be3d4fe9fb1be15aa6cf28dbea306151237c8
156 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 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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=the+phoenix+project+pdf+part+2 PDF link annotation
    • https://cdn.sqhk.co/lenawemijixe/FfF9Gib/balls_vs_blocks_balls_bricks_breaker_stack_blaster.pdfIn PDF document text
    • https://mofizuzu.weebly.com/uploads/1/3/4/3/134316779/32924b53c.pdfIn PDF document text
    • https://cdn.sqhk.co/konidadelan/suijMgf/solar_system_planets_and_moons_list.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383801/normal_5fcd66e21d355.pdfIn PDF document text
    • https://cdn.sqhk.co/jurugaguvedu/iHvgcLP/crossroads_movie_cast.pdfIn PDF document text
    • https://cdn.sqhk.co/tiluzegata/ffbshet/34793398988.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415526/normal_5fecc9d8099c2.pdfIn PDF document text
    • https://zadopelujon.weebly.com/uploads/1/3/4/8/134884154/4126581.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384308/normal_5fc894780afe8.pdfIn PDF document text
    • https://sujumakatu.weebly.com/uploads/1/3/1/3/131379709/6688272.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/ninasivol/bakuwelokofime.pdfIn PDF document text
    • https://s3.amazonaws.com/xujitezu/1535436943.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e479db15-b4db-47c4-8bbc-a8e97d1a71cf/wowuxikojebofefumiwob.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxawetawupo/black_and_decker_weed_trimmer_replacement_battery.pdfIn PDF document text
    • https://s3.amazonaws.com/vuraradaso/how_much_do_software_developers_make_in_australia.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/pavapujosotovadezufifidas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ab51868-caad-4667-9c35-5331acaf0d4e/cybex_arc_trainer_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c9c813d-9a17-4b82-88a9-597b4622fb4b/frigidaire_portable_retro_12-can_mini_fridge_efmis462_black.pdfIn PDF document text
    • https://s3.amazonaws.com/kefefetafij/antique_olive_compact_italic_free.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010e40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E40 5048 bytes
SHA-256: bca56e83add093896285422a408ae4bf41814d3fda895b657b152e8dacb670be
font_01_sfnt_off00011f57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F57 1800 bytes
SHA-256: e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
font_02_sfnt_off000127e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127E5 11244 bytes
SHA-256: d6aca504cdb52f4dcbd794b4d41cf62e822d94e16d9e09ba638d26f70462fb1d
font_03_sfnt_off00014e47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E47 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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