Malicious PDF — malware analysis report

Static analysis result for SHA-256 b96b45d2ca96596d…

MALICIOUS

PDF

89.8 KB Created: 2021-03-04 21:16:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 21c4d3ec0a279c0d1a9f268327ee4f86 SHA-1: 031abfbbd884cab5bb46861ff7062e2140c35a4d SHA-256: b96b45d2ca96596db50c540c976664b530a94883232e2ec79661d94499571578
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or SEO spam operation. One of the embedded URLs, 'https://xajibur.ru/award?keyword=the+traveler%2527s+gift+seven+decisions+that+determine+personal+success', is likely part of this malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://xajibur.ru/award?keyword=the+traveler%2527s+gift+seven+decisions+that+determine+personal+success PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4450047/normal_5fe81cfe69c72.pdfIn PDF document text
    • https://cdn.sqhk.co/fukonovum/jdgjbx4/tricky_riddles_brain_teasers_with_answers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413011/normal_601f158cb96f9.pdfIn PDF document text
    • https://cdn.sqhk.co/kukojuvata/Yx9L3WN/41026152947.pdfIn PDF document text
    • https://cdn.sqhk.co/govulasem/OhiJicS/kugaxuvuriv.pdfIn PDF document text
    • https://cdn.sqhk.co/jigavozef/pqQjb2n/frog_jumping_game_puzzle.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489975/normal_6002a9c99a77d.pdfIn PDF document text
    • https://cdn.sqhk.co/retirijozi/jaHFjbv/hammer_nail_log_game.pdfIn PDF document text
    • https://cdn.sqhk.co/bifoligi/bhbWQid/33322021474.pdfIn PDF document text
    • https://cdn.sqhk.co/xufojidaju/bKfyo7T/47219154054.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://uploads.strikinglycdn.com/files/94434ce6-8ef5-420f-bd4f-367f0326e78d/64001827385.pdfIn PDF document text
    • https://fa90eb46-aa9b-4fd1-a2e8-e903ec8e50a4.filesusr.com/ugd/575fb0_b896fb8d80e34a2a93521267180f3840.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/db86e581-d21e-41f4-a2cb-070ce2d33470/5102090759.pdfIn PDF document text
    • https://f74ea38a-ab8d-49a0-8d31-9a1d7ce64423.filesusr.com/ugd/5ceade_f9328846118a41cd93a2c2ac8b22cb0a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ab82817-42e5-4f02-b807-08bf917e7ed1/what_is_primal_magic.pdfIn PDF document text
    • https://44034db3-6cdd-4729-adf3-7ccd6afcf354.filesusr.com/ugd/9fe9cc_0e6b127f87c646cf95cdd4f9a8074f01.pdf?index=trueIn PDF document text
    • https://9fbaa0db-fe9e-443e-b503-3d02ea494c21.filesusr.com/ugd/d417e9_c17bc2e293bc443db55315a71bb56a3b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/550be080-2025-4d30-842f-79882cf48535/lujixiwujojodawun.pdfIn PDF document text
    • https://c7f0abc7-d23b-482d-bd16-0771495bb668.filesusr.com/ugd/bb13a2_e7c84681b6644f519a2f465fb7177ece.pdf?index=trueIn PDF document text
    • https://af30af13-e0b7-4de0-aca7-7783c01eade2.filesusr.com/ugd/9757e7_4429c54d0e694ce0ab5f51391e084eb3.pdf?index=trueIn PDF document text
    • https://4abf464d-34d5-4c80-8de5-e64f30e04530.filesusr.com/ugd/8b3eb5_985c69b800de4ff3895e8794218b39aa.pdf?index=trueIn PDF document text
    • https://bf808793-8b46-4c54-8b11-319763181fa0.filesusr.com/ugd/0d018b_6dd54f16cf3f429c92c16719fcb610bb.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000112cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112CF 5496 bytes
SHA-256: 2b7bd15e40972ddf9e7366b4d75852f884b28ffc297e467799ebca4afefa6c72
font_01_sfnt_off0001255c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1255C 11048 bytes
SHA-256: 5909884b76bbcd1c479dec242dec97085aa23dbb700a0473d82536b9b72e6e30
font_02_sfnt_off00014afb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14AFB 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333