Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a15352e4412f2a7…

MALICIOUS

PDF

75.6 KB Created: 2021-03-16 04:46:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 8462a07367a00d9751a6531007bf6800 SHA-1: 3f040c11b1ddda8ed5cb3cc36b5251ab464c6442 SHA-256: 9a15352e4412f2a77d2cf893902f6e97712bf24929df5da1e4fb6598d6fe40d1
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains numerous embedded URLs, with a prominent one leading to 'lozipotod.ru' disguised as a calorie deficit calculator. Heuristics indicate this PDF is part of a link farm on disposable hosting, and ClamAV detected it as a phishing trojan. The ML classifier also flagged it as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://lozipotod.ru/strik?utm_term=calorie+deficit+needed+to+lose+weight+calculator PDF link annotation
    • http://summerita.fun/1098377422134lfh.pdfIn PDF document text
    • https://tapizijivuvol.weebly.com/uploads/1/3/2/6/132696465/a5b1d32c0b0a52.pdfIn PDF document text
    • http://wunedefewadonif.22web.org/govudukulanolekita.pdfIn PDF document text
    • https://jagunafine.weebly.com/uploads/1/3/4/3/134363358/pelabilupodibuwanogi.pdfIn PDF document text
    • http://drilltech.info/65663656812pqc5x.pdfIn PDF document text
    • http://beautysale.site/call_of_duty_game_release_dates6tvqy.pdfIn PDF document text
    • https://xefinaloze.weebly.com/uploads/1/3/2/8/132814425/zulufeluno_tejas_goromef_mafutanopirowe.pdfIn PDF document text
    • http://yewes.space/lerizuxibagijafajofomirq8z1s.pdfIn PDF document text
    • http://nanolenka.xyz/how_to_write_science_fiction_short_storyr3vtx.pdfIn PDF document text
    • http://gonakasuzoze.22web.org/rafamafez.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://direpedokelazal.rf.gd/medusa_cartoon_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/126c71eb-70e0-47a4-bc9d-e988a26429bc/meade_etx_80_autostar_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48b07166-a64f-47e9-b6af-d3fd8bf9a01e/how_to_use_a_farberware_electric_pressure_cooker.pdfIn PDF document text
    • http://bufagefitazi.rf.gd/63775286183.pdfIn PDF document text
    • http://fazadag.rf.gd/bertrand_russell_the_conquest_of_happiness_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f12bd72a-76f6-4f86-b681-41058cadd770/51568384169.pdfIn PDF document text
    • http://runoxujozu.rf.gd/vowuxobuwatog.pdfIn PDF document text
    • http://binaraw.epizy.com/wowhead_warlock_bfa_guide.pdfIn PDF document text
    • https://299bc67c-4c9a-44ea-852c-18f2d39dca40.filesusr.com/ugd/954c8b_a39aa592e7904145a70580ef52928d24.pdf?index=trueIn PDF document text
    • https://76f5a3e5-08d8-4581-9975-6c1b933a1845.filesusr.com/ugd/dbbd16_197f71813a8d4308835e2a820be643cd.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eac9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC9 5280 bytes
SHA-256: 860ca0f41230b42a5cc30256814ca5a877142a52358b95e1897f9d6556173474
font_01_sfnt_off0000fcc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCC8 10536 bytes
SHA-256: d0496651598ec076a1e3dbd6020062ca55d3501e2d86de626203aad75b73d9d2

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