Malicious PDF — malware analysis report

Static analysis result for SHA-256 934008d56b57d70e…

MALICIOUS

PDF

96.1 KB Created: 2021-06-08 12:00:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 5e79ff5b3cbc189cc4ed88c0b83d8fb8 SHA-1: e8afe60eff712c99cac20be766e695976a42bdce SHA-256: 934008d56b57d70efbbdea0ce63352fdb9bb7910df4605b8cfb7301012f5027b
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://archism.ru/pbw?utm_term=a+b%25C3%25ADblia+da+aromaterapia+pdf+download PDF link annotation
    • https://jitaginedisa.weebly.com/uploads/1/3/4/3/134324559/6350e2ac541.pdfIn PDF document text
    • https://fizozedodid.weebly.com/uploads/1/3/4/4/134484686/dewudowukogalejunadi.pdfIn PDF document text
    • https://tewizoduwab.weebly.com/uploads/1/3/5/3/135341898/vapolilupujiv.pdfIn PDF document text
    • https://rugomekedakore.weebly.com/uploads/1/3/5/3/135302214/wusoluzo-suzuzol-tuwaxed-pibewipuxita.pdfIn PDF document text
    • https://rabivavas.weebly.com/uploads/1/3/0/9/130969809/dinamej-xojeta-soxazagapelizev.pdfIn PDF document text
    • https://nuruvubapifak.weebly.com/uploads/1/3/1/4/131452890/muxasepizoxaj-sisobesosujaxaf-ninelegewibozib.pdfIn PDF document text
    • https://fapufeloku.weebly.com/uploads/1/3/1/0/131071019/cfc6c8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/939f6d88-7084-4c44-b1e9-bd3517793ec9/learning_american_sign_language_2nd_edition.pdfIn PDF document text
    • http://juvudibip.pbworks.com/f/arranging_words_alphabetically_worksheets_for_grade_4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfc9dda2-efb6-4993-9e5e-05a0e67b992f/17184083074.pdfIn PDF document text
    • http://jakomija.pbworks.com/w/file/fetch/144715095/bokage.pdfIn PDF document text
    • http://vesenimu.pbworks.com/w/file/fetch/144815196/29719720172.pdfIn PDF document text
    • http://niluputevi.pbworks.com/w/file/fetch/144452697/how_to_install_android_sdk_manager_on_ubuntu_18.04.pdfIn PDF document text
    • http://midevodimu.pbworks.com/f/gebenomarivix.pdfIn PDF document text
    • http://betifufato.pbworks.com/w/file/fetch/144613302/56120409299.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2258ec19-fa17-4b7b-bd86-0f89c10bc4e3/what_is_the_fee_for_drivers_license_renewal_in_illinois.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ef80dc0-47a9-429d-acdd-3efc8e81aeaf/90170052021.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa722ad9-a591-4be2-8404-a583293248c8/39800760354.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbc16a47-a431-48ea-a5f6-68dc8c0672fb/93133426620.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69365389-4d0a-4df8-983b-d0907b7e562d/nikko_stirling_gameking_3.5-10x44mm_scope_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0bda7a7-21e0-4ecc-b1a6-fdfff9f44992/36993110904.pdfIn PDF document text
    • http://togiwuvoze.pbworks.com/f/download_shokugeki_no_souma_season_4_sub_indo_meownime.pdfIn PDF document text
    • http://biselafibe.pbworks.com/f/xatulilogudop.pdfIn PDF document text
    • http://padimagofo.pbworks.com/f/23995289442.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c07c9017-7147-4d12-89e4-59e36f4302e7/13384982190.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_off00013527.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13527 5284 bytes
SHA-256: a03f7de74aab1d7fd94dfec2ec544ba58bf53aecab47282cb0bed0955ebbe29b
font_01_sfnt_off0001471a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1471A 12796 bytes
SHA-256: d699fd89acb4f72fd912750c36d82effc0cce9818af3c5caf86280142d1d25db