Malicious PDF — malware analysis report

Static analysis result for SHA-256 8585c0fbd7f5e076…

MALICIOUS

PDF

80.6 KB Created: 2021-02-12 00:17:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 20009d0f0355fa810c6d65a520294a3c SHA-1: 76a52b9d5108901b522b9aa536c7c1cc70c3e3d8 SHA-256: 8585c0fbd7f5e076e83b820e77265225e15aa608f0be34b06af93306dcc4d481
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to redirector infrastructure and potentially malicious content, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' heuristics. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution via these links. No scripts were extracted, but the PDF structure itself facilitates the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/123?utm_term=runkles+york+pennsylvania In PDF document text
    • https://cdn.sqhk.co/nokotadi/g9ig27W/zelezitu.pdfIn PDF document text
    • https://cdn.sqhk.co/joxopejufito/0oibhjJ/open_houses_today_plymouth_mn.pdfIn PDF document text
    • https://cdn.sqhk.co/rabovafom/jhjqn93/cold_war_call_of_duty_trailer_music.pdfIn PDF document text
    • https://xikubafol.weebly.com/uploads/1/3/4/6/134607040/5afde.pdfIn PDF document text
    • https://cdn.sqhk.co/lokuwanij/20cQzbO/rally_racer_dirt_apk_day.pdfIn PDF document text
    • https://rifubagozoj.weebly.com/uploads/1/3/2/6/132695416/44748f5401e.pdfIn PDF document text
    • https://fikejibin.weebly.com/uploads/1/3/4/3/134331262/tukufisupabeku-buxavazop.pdfIn PDF document text
    • https://cdn.sqhk.co/rozopebak/ibjaUzf/fagav.pdfIn PDF document text
    • http://cancandance.org/atividades_sobre_poligonos_5_anop144y.pdfIn PDF document text
    • https://cdn.sqhk.co/dijowasedop/zFnjehe/94839010602.pdfIn PDF document text
    • https://cdn.sqhk.co/tojofelekob/Qrmiahi/59369479020.pdfIn PDF document text
    • https://cdn.sqhk.co/lazodadevab/gepOPny/51345329238.pdfIn PDF document text
    • https://cdn.sqhk.co/fazituku/2agd6gg/66376889458.pdfIn PDF document text
    • https://cdn.sqhk.co/dijogiper/hcifiju/lewokivixejupekatubamebu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/vatakefojunib/free_end_credits_template_sony_vegas.pdfIn PDF document text
    • https://s3.amazonaws.com/vonuxagupeduze/48673109412.pdfIn PDF document text
    • https://s3.amazonaws.com/dudigonifu/enterprise_risk_management_policy_template.pdfIn PDF document text
    • https://s3.amazonaws.com/vunizi/pemedafigub.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2DB 4848 bytes
SHA-256: 62066e0d81254aa6088766e5eb7cde3c27a9a901c252a5b45d21155abe23bbc4
font_01_sfnt_off0001036a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1036A 10404 bytes
SHA-256: 508cb96742cf812768dffd9afe9ee89496bb90eab0b806a6e99018239ae2fe1e
font_02_sfnt_off0001270a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1270A 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

Open this report in the interactive analyzer, or submit your own file for analysis.