Malicious PDF — malware analysis report

Static analysis result for SHA-256 71008e0e6ca8c179…

MALICIOUS

PDF

88.3 KB Created: 2021-03-29 21:45:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 95fb7e20162e5c51b4eeecef0d5fe9e0 SHA-1: b8089b8be958b1cfb6cd99906e8dc37b49085ae0 SHA-256: 71008e0e6ca8c1798f305833563b4c08662f0e4b12f17f9a3e3b74329379e982
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URLs, many of which are hosted on disposable domains or link farms, indicating a phishing or scam attempt. The document body, though heavily garbled, suggests a lure related to 'Colombian relief forms for children', likely to entice users to click on the embedded malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • 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://kuzutuzo.ru/strik?utm_term=formas+de+relieve+colombiano+para+ni%25C3%25B1os PDF link annotation
    • http://lezofifividex.scienceontheweb.net/lesivedufududa.pdfIn PDF document text
    • http://bcpzon4segurabetaviabcp.com/articulo_430_de_la_constitucion_mexicana26fln.pdfIn PDF document text
    • http://fopokigife.mywebcommunity.org/augusto_cury_livros_o_homem_mais_inteligente_da_historia.pdfIn PDF document text
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdfIn PDF document text
    • https://cdn.sqhk.co/vaminika/2DAtYaw/turbocharger_vs_supercharger_pros_and_cons.pdfIn PDF document text
    • http://zobabikox.medianewsonline.com/pixidufagulubowux.pdfIn PDF document text
    • https://madajeguruxe.weebly.com/uploads/1/3/4/3/134348767/5851241.pdfIn PDF document text
    • http://sowoxapexemex.sportsontheweb.net/vunamomi.pdfIn PDF document text
    • http://butalinonoruma.scienceontheweb.net/fologekeruf.pdfIn PDF document text
    • http://retys.space/poxefxq3xz.pdfIn PDF document text
    • https://cdn.sqhk.co/tolebilu/ghPgeii/pixel_gun_3d_mod_apk_developer_menu.pdfIn PDF document text
    • https://vexefanakaxaki.weebly.com/uploads/1/3/4/8/134871487/1be6d0.pdfIn PDF document text
    • http://edarudost.online/what_is_a_99_year_ground_leasewhrxb.pdfIn PDF document text
    • https://girowotejetut.weebly.com/uploads/1/3/1/4/131406843/ravogoxoxuzanuz-mubukewixu-jolajul-kijede.pdfIn PDF document text
    • https://tevaxuxelajuri.weebly.com/uploads/1/3/2/7/132712575/liwosavomudugafigebi.pdfIn PDF document text
    • http://therarbooks.com/zunep2iucd.pdfIn PDF document text
    • https://kadezejuvi.weebly.com/uploads/1/3/4/6/134603763/1072708.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://filirepakej.epizy.com/life_of_galileo_galilei.pdfIn PDF document text
    • http://kexekezon.epizy.com/10827324572.pdfIn PDF document text
    • http://zomimuju.rf.gd/fire_emblem_heroes_lunatic_guide.pdfIn PDF document text
    • http://fubavinexazixo.onlinewebshop.net/mofobosebuzuzel.pdfIn PDF document text
    • http://zewukiro.epizy.com/can_i_use_playstation_3_controller_on_ps4.pdfIn PDF document text
    • http://jawuwibunoropo.atwebpages.com/61923906031.pdfIn PDF document text
    • http://lafagelupuf.myartsonline.com/value_of_higher_education_in_india_essay.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000118fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118FC 5584 bytes
SHA-256: d40fb06809b0d94c1f327dc04ad3f9d6a874e2cb382b5caf648630dffb9a07fc
font_01_sfnt_off00012b9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B9E 11404 bytes
SHA-256: d74acfedd84eed7467137df9876b78b977deb6a150693c8751aaede44a5c1563

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