Malicious PDF — malware analysis report

Static analysis result for SHA-256 34edefa340ab4d21…

MALICIOUS

PDF

84.0 KB Created: 2021-05-03 03:09:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: d5e478e5cf8d76bc70c696a42f7ad29d SHA-1: 82e8e284062108114b2a82334946f7a6cb0047f3 SHA-256: 34edefa340ab4d21c2caac03503a53392885321dfa833d724803eefb053d4bec
184 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded URLs, many of which point to disposable domains and redirector services, indicating a phishing or spam campaign. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' specifically flags a link to a known malicious redirector, and the ML classifier strongly indicates maliciousness. While no scripts were explicitly extracted, the structure and numerous links suggest an attempt to direct users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 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.
  • 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/strik?utm_term=bernays+propaganda+pdf+deutsch In PDF document text
    • https://cdn-cms.f-static.net/uploads/4421038/normal_5fdb2b5d98749.pdfIn PDF document text
    • http://datinge.site/43106682397n58i8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411683/normal_5ffb7642115c7.pdfIn PDF document text
    • https://wirosumarot.weebly.com/uploads/1/3/1/3/131398493/gimobijodeb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375353/normal_60058fb4de43c.pdfIn PDF document text
    • https://nimimetifav.weebly.com/uploads/1/3/2/8/132814674/9887405.pdfIn PDF document text
    • http://goodsfor.life/the_hunchback_of_notre_dame_2_trailer_2001y7378.pdfIn PDF document text
    • http://coloradocustomelectric.com/plantronics_wireless_earbuds_with_mictbfb6.pdfIn PDF document text
    • https://remogomati.weebly.com/uploads/1/3/4/7/134748537/kidoguride-kawukupot-xugavapepapaf-burelisijawawi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450890/normal_5ff6c7981ba40.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426812/normal_5fd9aef9e232d.pdfIn PDF document text
    • http://mapugukabazewu.scienceontheweb.net/el_programa_minimalista.pdfIn PDF document text
    • http://salestore.pro/alien_shooter_2_apk_unlimited_moneyog4d6.pdfIn PDF document text
    • http://tinipen.medianewsonline.com/importance_of_collective_bargaining_agreement.pdfIn PDF document text
    • http://useporte.xyz/how_do_i_fill_out_a_blank_checkn6e9x.pdfIn PDF document text
    • http://pobunav.sportsontheweb.net/definition_of_motivation_file.pdfIn PDF document text
    • http://nicechange.space/nosimenaxukifo0nv1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473651/normal_601925f263c26.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408875/normal_5fe2c0e9ab4a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420030/normal_6051abed669a0.pdfIn PDF document text
    • http://bullbananavannaone.xyz/periodic_and_non_periodic_signals_examples29tk9.pdfIn PDF document text
    • https://lufaranari.weebly.com/uploads/1/3/4/6/134689474/c128308cfd7b.pdfIn PDF document text
    • http://sebevifa.getenjoyment.net/3916952654.pdfIn PDF document text
    • https://mufalugibesenu.weebly.com/uploads/1/3/1/4/131453255/7030079.pdfIn PDF document text
    • http://testvvd.xyz/wedding_song_playlist_templatetvr36.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010552.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10552 5536 bytes
SHA-256: b5d21ce3cf0d456493f393d821fd412f4379eb0d909633f2284896f0e5ec0e76
font_01_sfnt_off0001182e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1182E 12416 bytes
SHA-256: 1684c37e33685802000600e5f014909c8100359137ac3cd1c6e7735ce10aaeef