Malicious PDF — malware analysis report

Static analysis result for SHA-256 22fedd5f56cafe02…

MALICIOUS

PDF

77.9 KB Created: 2021-06-11 10:31:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: f010d393f8e3f65c5943cca3e0efcbef SHA-1: af65046948419e03ab119372e78fe1fb2cf4ffb9 SHA-256: 22fedd5f56cafe027dd6c7fb8329a8d9b40bcf19ef16c2f99d3075155a9eef0c
194 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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://pistant.ru/pbw?utm_term=bubble+shooter+game+for+pc PDF link annotation
    • https://vimiwegom.weebly.com/uploads/1/3/0/7/130775837/6972198.pdfIn PDF document text
    • https://xokotenesuku.weebly.com/uploads/1/3/1/4/131438709/fibalutuj.pdfIn PDF document text
    • https://warubeduzubam.weebly.com/uploads/1/3/5/2/135298611/6426961.pdfIn PDF document text
    • https://binaxurekise.weebly.com/uploads/1/3/1/3/131381555/fc834.pdfIn PDF document text
    • https://satalediveli.weebly.com/uploads/1/3/4/0/134018026/7563571.pdfIn PDF document text
    • https://tigasuzile.weebly.com/uploads/1/3/1/3/131379741/7a9f8fc84.pdfIn PDF document text
    • https://kuvekimat.weebly.com/uploads/1/3/6/0/136052924/8db670f.pdfIn PDF document text
    • https://xigogedamexov.weebly.com/uploads/1/3/1/3/131384098/ruvikugosup_jusosamo_tixifipogez_wetewul.pdfIn PDF document text
    • https://neninilez.weebly.com/uploads/1/3/3/9/133986457/kinoludud.pdfIn PDF document text
    • https://povuwifapijolak.weebly.com/uploads/1/3/4/2/134265363/kokopogej.pdfIn PDF document text
    • https://famixupeb.weebly.com/uploads/1/3/4/7/134733803/satonom.pdfIn PDF document text
    • https://wawukonuxoni.weebly.com/uploads/1/3/4/0/134095992/visijedagoseva.pdfIn PDF document text
    • https://resodafuwagolip.weebly.com/uploads/1/3/4/3/134313475/4e44dab45f.pdfIn PDF document text
    • https://nizodori.weebly.com/uploads/1/3/4/0/134000204/jegugorowiwivideboke.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/97f058b7-5d78-4547-9776-c6784824c1cc/42407823048.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f54f6021-942c-464b-8b34-f9df5ff95ce3/14154149900.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae51225d-2d28-468d-ac5a-9d2dd5cc0344/bosch_axxis_not_draining.pdfIn PDF document text
    • http://genarozep.pbworks.com/w/file/fetch/144523080/high_school_parent_brag_sheet_example.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3afe9726-3298-44c0-ade0-4a33456426a0/nabadawonexibomexi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5349236-1ca8-4855-bf19-6d90bb019aaa/25272566690.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/379932b0-fd96-493d-bc13-c101099e105b/how_to_write_a_contract_for_a_loan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3eb36538-86a2-4eb6-a0a3-0f9aa00dae72/suvefoxejes.pdfIn PDF document text
    • http://fujiserefi.pbworks.com/w/file/fetch/145014786/conditional_1_2_3_exercises.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50f4a6bf-0ca1-439b-8c44-e249bb93e6a6/24876259820.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4032e2ee-e56e-4cb5-8913-af8bab33635a/nagumopigoxamiwexewi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a25b438-2847-4b05-a5ee-70a374804d6c/culligan_water_softener_water_tastes_salty.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_off0000f10d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF10D 5616 bytes
SHA-256: 70c3871e7fca1edf50a3afc0db46b261f596b6ae6b382985f099771190abddfc
font_01_sfnt_off000103fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103FE 11096 bytes
SHA-256: 064971964eecfc2fe7474eb035b6067910f3b5dc496d85da7caf469c39cbe36a