Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fd3ff69b4d3bcc7…

MALICIOUS

PDF

76.5 KB Created: 2021-02-22 14:15:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 81ecc1fa373432489f38fe9be1dcd12b SHA-1: 2906bf276002eddaaa0ea92272f6a64452d353a3 SHA-256: 2fd3ff69b4d3bcc77ddb4d4b985c557fb7d5cf102c592b8e3207f269eb043ad6
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable hosting, indicating a link farm or SEO manipulation attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or distributing further malware. No scripts were extracted, but the presence of external URIs and the link farm heuristic point to a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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/aws?utm_term=a+first+course+in+differential+equations+with+modeling+applications+11e+11th+edition+pdf PDF link annotation
    • http://bodegumuxizobi.22web.org/51590176560.pdfIn PDF document text
    • https://pumelagu.weebly.com/uploads/1/3/2/8/132814433/6491797.pdfIn PDF document text
    • https://cdn.sqhk.co/sabepakofo/hhsbVgi/beat_swiper_godzilla.pdfIn PDF document text
    • https://cdn.sqhk.co/poladejug/dNpjfDd/the_new_york_times_crossword_book.pdfIn PDF document text
    • http://lighttravel-ng.com/trueman_biology_free_downloadrc9fz.pdfIn PDF document text
    • https://cdn.sqhk.co/ranemagesoga/hgfheO5/45742481399.pdfIn PDF document text
    • https://gawokuvaz.weebly.com/uploads/1/3/4/6/134656265/fekol-kupux-jurupabozebod.pdfIn PDF document text
    • https://fosuwelu.weebly.com/uploads/1/3/2/6/132695698/jagavew-pajosi-domil-kanirataruv.pdfIn PDF document text
    • http://subumobo.22web.org/gazanavatupufubeluti.pdfIn PDF document text
    • https://cdn.sqhk.co/fedelubu/5EhfifL/15316491454.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vezavajizuvos.epizy.com/38772529233.pdfIn PDF document text
    • http://favekagopu.epizy.com/tixowisaxegub.pdfIn PDF document text
    • http://suwutosu.epizy.com/clat_2014_question_paper_with_answers.pdfIn PDF document text
    • http://ketolunumakomez.rf.gd/odia_film_new_song_all.pdfIn PDF document text
    • http://munoxefarofow.rf.gd/16936044448.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_off0000eaf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAF7 5828 bytes
SHA-256: 7ce8b21434070510218b5ba22c8608eb64d89abce7fd9a8e527603673ec4482c
font_01_sfnt_off0000feb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEB4 11032 bytes
SHA-256: d2d7bc48774117b73420c34b39f0d9e72ab9e37f7fab107f5a491e334152dc25

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