Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c9b108fc01a1749…

MALICIOUS

PDF

80.3 KB Created: 2021-03-19 16:57:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 016bc833821ad9ecd80eaecfac35a0db SHA-1: 8e47a0032b44b4e753317503f0fab7f877e3884b SHA-256: 7c9b108fc01a1749fba605d6521f1c6ceb9fe4b0ba046707ebd0d7d0ac72aa14
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable hosting or unknown domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a phishing lure designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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 http://legobibeli.22web.org/revedadowodeneweponur.pdf In PDF document text
    • http://pidijajuwupurop.medianewsonline.com/37618835161.pdfIn PDF document text
    • https://weralafopibobal.weebly.com/uploads/1/3/4/3/134338927/kodezivamixadijaza.pdfIn PDF document text
    • https://xapewagese.weebly.com/uploads/1/3/4/3/134314981/7871645.pdfIn PDF document text
    • https://gepulepefuxogu.weebly.com/uploads/1/3/2/6/132683228/76605edb6b399ac.pdfIn PDF document text
    • https://gigunomivu.weebly.com/uploads/1/3/0/9/130970016/7005741.pdfIn PDF document text
    • http://xolimaked.iblogger.org/5017418526.pdfIn PDF document text
    • https://vebodejivab.weebly.com/uploads/1/3/2/3/132302978/xibogalapopavenelus.pdfIn PDF document text
    • https://solezoxi.weebly.com/uploads/1/3/4/6/134654925/maximerino_lazado.pdfIn PDF document text
    • http://medebupima.sportsontheweb.net/chinese_calligraphy_made_easy.pdfIn PDF document text
    • http://vetobiz.sportsontheweb.net/les_aliments_riches_en_calcium.pdfIn PDF document text
    • http://kefudepoduwudi.sportsontheweb.net/doxigulurozidirobigudolez.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://feedproxy.google.com/~r/wb/ENAH/~3/jJyWpsOf3IE/wb?keyword=is%20the%20lexus%20gx%20460%20worth%20buyingPDF link annotation
    • https://s3.amazonaws.com/lerezazo/coreldraw_2018_full_version_with_crack.pdfIn PDF document text
    • http://borepojoga.epizy.com/buvunikibixoxak.pdfIn PDF document text
    • http://xekabotiwuker.atwebpages.com/robuxemoxokor.pdfIn PDF document text
    • http://bamopikubo.epizy.com/free_antonyms_worksheets_for_2nd_grade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b071c0b6-26b3-49ec-8645-ea1541bb0910/shark_rotator_professional_lift_away_nv501_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/fulosobezur/xozamagosameteburisu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec020ad4-6eb5-472e-8c17-413883c6a856/fuwazeji.pdfIn PDF document text
    • https://s3.amazonaws.com/rilexazejuzovep/violin_sheet_music_for_cotton_eyed_joe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2fab36b-e994-41e8-9a5d-3b30c8f37ed1/64294325150.pdfIn PDF document text
    • https://s3.amazonaws.com/jodabiladezot/sisuvuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8af802b2-3ef5-4981-9654-ae24536d4267/34843807786.pdfIn PDF document text
    • http://lugorazezeg.rf.gd/biofertilizers_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d62790f9-3b7a-4411-bafc-51465026cffb/how_to_help_bilingual_students_in_the_classroom.pdfIn PDF document text
    • https://s3.amazonaws.com/nodetuxapabara/taxagadarevotivapuf.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_off0000fb9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB9A 5460 bytes
SHA-256: 6b82180b4ec76a098226081d1ab5555b0a0b00ecb24cfb71b2d3baa8392f530c
font_01_sfnt_off00010e4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E4E 10964 bytes
SHA-256: 623d9eedb61e66c590ad8ff8f6354ed3d5668f4fcbe2d8b9691a6d108b4c2fa6