Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6c66d8f3d50be9b…

MALICIOUS

PDF

69.6 KB Created: 2021-03-15 04:55:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: ca26b4f2f4c89404b043cae810c9a8ab SHA-1: d2688b1004fb979dfcb004ad56dc0a310989d04c SHA-256: c6c66d8f3d50be9ba515052fd2466d2835ffda76f1c3afefdc6b9baf51175f07
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing attempt. The primary URL, https://soxebez.ru/strik, is likely part of a campaign to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://soxebez.ru/strik?utm_term=united+colors+of+benetton+near+me PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4394077/normal_6010287af083b.pdfIn PDF document text
    • http://tetizeniwa.mypressonline.com/48989984320.pdfIn PDF document text
    • http://bibopasaxuvibu.mypressonline.com/vcf_to_converter_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469630/normal_601f1bd229e0b.pdfIn PDF document text
    • http://kefijor.mygamesonline.org/cervical_spine_rom_exercises.pdfIn PDF document text
    • http://dikagowoxi.sportsontheweb.net/gaxosipebazijenesazumitot.pdfIn PDF document text
    • http://fakexexu.sportsontheweb.net/kevikutejuboxapowek.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372373/normal_5fea277a2e7b1.pdfIn PDF document text
    • http://puzexijabin.mypressonline.com/32744217352.pdfIn PDF document text
    • http://setokanekema.mygamesonline.org/31590907353.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419236/normal_5fd6641d10d4a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rexefobixavater.myartsonline.com/31760561889.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be68bc25-b26c-4496-ab9d-fc5c655f597c/70256177157.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27562ca0-d5f2-43e7-9bf8-f76e5688eea4/epiphone_les_paul_ultra_iii_wiring_diagram.pdfIn PDF document text
    • https://a3720f92-bdaa-4449-a3ff-14f36884d2d5.filesusr.com/ugd/afadc3_8d421ae286f74cb8bec015e9fc9ad3c2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e95aa884-ae4c-4a29-bb18-f958c5b6ae28/watowabokeposodiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe33f1c4-f66e-4b14-9000-9d8f4ddf5020/jadawazegugovofesedob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a5e2b7f-c3bf-4e52-bf85-57fcb7ed12dd/52951036675.pdfIn PDF document text
    • https://1c92f6d8-19eb-429c-9239-1cf6be91372f.filesusr.com/ugd/cc1a03_b56acca4546044bbaa58e2a2e1c0cc24.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/26bd1d7b-e085-47ee-b300-b7c1357575e5/rerugotov.pdfIn PDF document text
    • http://tikeresepujel.onlinewebshop.net/60171230738.pdfIn PDF document text
    • https://bff5fdab-9fd0-4670-908b-a1308bb5a9cb.filesusr.com/ugd/227d0f_d43ca9c9cc50459dbdfab373e1b38e04.pdf?index=trueIn PDF document text
    • https://c2093f15-f4fb-4bda-9582-db5404103fa6.filesusr.com/ugd/b28561_682334c1b0e94c04ae2185ac1d4bcf32.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6c38224-4634-4caf-9440-f520952dac38/8020550106.pdfIn PDF document text
    • http://bogalibamadom.myartsonline.com/pigabobowifogobova.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f362019-8fac-4895-9387-340a5731ac27/fifty_shades_of_grey_2016_movie.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_off0000d2e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2E5 5296 bytes
SHA-256: 24ab1d1b527a7d9a41cb8082abab623420e02d725a0a35896e3f628d7bdb5864
font_01_sfnt_off0000e4d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D6 10648 bytes
SHA-256: 553b892f086e1ca539890d37b36fa7009100349c1c4f69be6ed0de2e399a25c0