Malicious PDF — malware analysis report

Static analysis result for SHA-256 b806dfd7b96cf935…

MALICIOUS

PDF

84.4 KB Created: 2021-02-21 23:06:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b113e86c8b7e2f2926d814977b640f2e SHA-1: ba53b1cbd780e4b6feb88a24544235f15e3c764f SHA-256: b806dfd7b96cf935b490a76966fe9cfa390595a6a1f55566b322b8d9426baf6f
206 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable hosting services, indicative of a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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://jacksth.ru/strik?utm_term=what+food+builds+mucus PDF link annotation
    • https://kibugisire.weebly.com/uploads/1/3/4/0/134018652/lanokirubederenod.pdfIn PDF document text
    • https://dawasaga.weebly.com/uploads/1/3/0/9/130969366/vadawegaku_misazafomap_nabodafipad.pdfIn PDF document text
    • http://avbox.org/koxawajusajewedununofasvglt.pdfIn PDF document text
    • https://cdn.sqhk.co/dumotometapo/hhefjjy/cyberpunk_2077_countdown.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485149/normal_5ff00dfaec065.pdfIn PDF document text
    • https://gekitudofu.weebly.com/uploads/1/3/4/4/134403565/c17b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455370/normal_601c8969d5dfa.pdfIn PDF document text
    • https://cdn.sqhk.co/fusajovogi/ZPsDria/romantic_getaways_from_memphis.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464532/normal_5fedcc2904de6.pdfIn PDF document text
    • https://tawozajoruje.weebly.com/uploads/1/3/4/3/134314125/zonodovaxonepuzuwo.pdfIn PDF document text
    • https://cdn.sqhk.co/numovasovev/ivNjijd/pulse_oximeter_readings_chart.pdfIn PDF document text
    • https://zelelifejoba.weebly.com/uploads/1/3/4/3/134321633/5369375.pdfIn PDF document text
    • https://s3.amazonaws.com/daselex/ib_bri_mobile.pdfIn PDF document text
    • https://resuzomesidi.weebly.com/uploads/1/3/4/7/134746605/36769eab60b.pdfIn PDF document text
    • https://s3.amazonaws.com/loranoduzuja/lidapoxe.pdfIn PDF document text
    • http://navalny.design/gososujevowodavaxexijtru8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d17c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD17C 11940 bytes
SHA-256: ea22a702df719d748d5ec9c56a87c01606134975446d77013a4cdd5b5420112d
font_01_sfnt_off0000f7f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F3 5316 bytes
SHA-256: 22fabb0c3aa6e65863b494e97f1adc697ef0035dcd5c7e8abb257734c14c3de0
font_02_sfnt_off000109f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109F5 11176 bytes
SHA-256: c0a71a382a1ebbbc1ff1fbb0537bf702e9dee5dd70265e5bce1e12758448755e
font_03_sfnt_off00012f61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F61 16060 bytes
SHA-256: 73f6f760a67782f27700c3ed047511a210a1e3765a9cc4fd416c63ff6a2522af