Malicious PDF — malware analysis report

Static analysis result for SHA-256 500ed3eed4398072…

MALICIOUS

PDF

86.2 KB Created: 2021-06-12 21:08:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 44cd06fdcdfc7e063083448c3c304278 SHA-1: 3ecd8564351be9867c328c7d8571f2acd81d51b4 SHA-256: 500ed3eed43980729daee7c98d38e73f34efca53bd1a10675208465295075e59
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one prominent external URI pointing to a suspicious domain. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a link farm on disposable hosting, suggesting a malicious intent to redirect users. The ML classifier and ClamAV detection strongly indicate malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://xezojetit.ru/123?utm_term=simplifying+indices+worksheet+tes PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374536/normal_603edd703a55e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416128/normal_6059c8d76de87.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372072/normal_601831aadd5e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454419/normal_604ccc35a9de2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445733/normal_6023eb60357bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477913/normal_5fd2469ec23e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470231/normal_5fea0404e702e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375702/normal_5ff75735c3768.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fufitiruw.pbworks.com/f/puwerigegu.pdfIn PDF document text
    • http://kelivesas.pbworks.com/w/file/fetch/144474594/78139315930.pdfIn PDF document text
    • http://kevuxezedila.pbworks.com/f/89848346711.pdfIn PDF document text
    • http://domewisisu.pbworks.com/f/37331807285.pdfIn PDF document text
    • http://risuxujuvu.pbworks.com/w/file/fetch/144483435/how_to_make_anime_face_in_capcut.pdfIn PDF document text
    • http://genarozep.pbworks.com/w/file/fetch/145125864/nouns_worksheet_for_grade_3_with_answers.pdfIn PDF document text
    • http://famukaser.pbworks.com/w/file/fetch/145108503/gorojomopodoxol.pdfIn PDF document text
    • http://zabodovojif.pbworks.com/w/file/fetch/144598611/xetanefegogosumoxisefi.pdfIn PDF document text
    • http://sawanixum.pbworks.com/w/file/fetch/144522192/supiriwipiresesi.pdfIn PDF document text
    • http://lokifasowaso.pbworks.com/w/file/fetch/144724278/kakoxikolufevi.pdfIn PDF document text
    • http://nudenuxote.pbworks.com/w/file/fetch/144977679/halsey_without_me_audio_mp3.pdfIn PDF document text
    • http://kedetuwi.pbworks.com/f/68949923709.pdfIn PDF document text
    • http://kuzukiwirimi.pbworks.com/w/file/fetch/144904860/gipawus.pdfIn PDF document text
    • http://jowukon.pbworks.com/w/file/fetch/144727911/xorewinikatujomukoxowuwe.pdfIn PDF document text
    • http://xinunubaz.pbworks.com/f/simekobilubatuse.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_off000110bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110BC 5720 bytes
SHA-256: b103d7635935ea151d335e7b2440e5be0f001e5d3f9b2f5f35e672f4d1575b74
font_01_sfnt_off0001242b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1242B 10984 bytes
SHA-256: 2571cc5c32286564910f764aafc9f68a77221a4345b2d6a1db445b2add0b966d

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