Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8211268abe72b48…

MALICIOUS

PDF

79.9 KB Created: 2021-06-11 19:40:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 9808c9fb6c57c6057ee83ed644849139 SHA-1: 6c23f4b74d34592953c22c9ba8411765cc5c50ea SHA-256: d8211268abe72b486231371959bcc19ff0d71c3d80f736ce98f8626fc9bfb45e
194 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a link farm designed to redirect users to download pages. The document contains numerous external links, many pointing to disposable hosting, and includes a call-to-action phrase suggesting a download lure. The primary URL, 'https://oniceh.ru/pbw?utm_term=easy+frp+apk+free+download', indicates a phishing or malware distribution attempt related to FRP bypass tools.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://oniceh.ru/pbw?utm_term=easy+frp+apk+free+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4485305/normal_6018eef05052c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369776/normal_60591f427bd59.pdfIn PDF document text
    • https://tobopitoru.weebly.com/uploads/1/3/4/8/134872655/duzidazarexowapi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379968/normal_6067bdf589d31.pdfIn PDF document text
    • https://kawifapexevudo.weebly.com/uploads/1/3/4/7/134711131/763222.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4409425/normal_60b4e48a6a90a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416495/normal_5fe15479801d5.pdfIn PDF document text
    • https://vopakumadojaga.weebly.com/uploads/1/3/4/3/134361244/zujanu_zogazabofege_dukeka.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450039/normal_5fe51d3dc077c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487906/normal_5ff5b0e0399b2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380674/normal_60038ab1c9aaa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388820/normal_605338d665044.pdfIn PDF document text
    • https://toxuxejegeze.weebly.com/uploads/1/3/5/3/135317786/13d77421.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391909/normal_605fa9e22b056.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453328/normal_5fe9abcb0b672.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4393635/normal_60b4dbdcd3179.pdfIn PDF document text
    • https://nakakikixug.weebly.com/uploads/1/3/4/4/134490848/foledege.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
    • http://gosirata.pbworks.com/f/47143981222.pdfIn PDF document text
    • http://jijagenaneke.pbworks.com/w/file/fetch/144445239/bewesodijexar.pdfIn PDF document text
    • http://mikabipi.pbworks.com/f/how_long_does_a_bank_take_to_process_a_money_order.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_off0000ee2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE2B 4912 bytes
SHA-256: be81a367f2c627895fbee5234788e1b2b04af1c2c2d427450a7f2a9c5e5f5234
font_01_sfnt_off0000ff00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF00 11000 bytes
SHA-256: 1d5bdda8e1f9dbe7141c5bd2d8b8af4b239d46669b73c6503f2ac476fce1b07c
font_02_sfnt_off00012464.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12464 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333