Malicious PDF — malware analysis report

Static analysis result for SHA-256 cec3bc19afc46c57…

MALICIOUS

PDF

70.7 KB Created: 2021-06-09 09:37:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 638d2f671539793be914c5f0c505410c SHA-1: 3d30824dfd96954a9883c1813901f1939f270963 SHA-256: cec3bc19afc46c57e41b1f5ab0d27e7f2e560865618361f361fff85bee35697a
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one prominent URL identified as a potential phishing or malware distribution point. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of embedded URLs and the overall structure suggest this PDF is designed to redirect users to malicious content, likely as part of a phishing campaign.

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://queure.ru/pbw?utm_term=when+we+ruled+robin+walker+pdf PDF link annotation
    • https://zibabesisem.weebly.com/uploads/1/3/4/6/134670176/mozegawuwoxe-jawopezaxujufen-xifoka.pdfIn PDF document text
    • https://boviseweduxiraz.weebly.com/uploads/1/3/0/7/130776594/7382213.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498992/normal_60380d7d32eb6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387698/normal_5ff3a3252e60d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491725/normal_5ff85306bbd82.pdfIn PDF document text
    • https://luligokim.weebly.com/uploads/1/3/4/7/134715748/2876203.pdfIn PDF document text
    • https://tanibegaw.weebly.com/uploads/1/3/4/6/134600132/5434390.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447912/normal_6008f99727195.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/302636d2-639f-4e11-846d-b6354f083555/luguz.pdfIn PDF document text
    • http://veniwusuj.pbworks.com/w/file/fetch/144637029/46777002937.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11218853-a808-44bf-bd46-08ce804d5a06/is_watching_movies_on_google_drive_illegal.pdfIn PDF document text
    • http://bowawesup.pbworks.com/w/file/fetch/144639471/68864709831.pdfIn PDF document text
    • http://litorabi.pbworks.com/w/file/fetch/144515919/en_sortant_de_lcole_paroles__imprimer.pdfIn PDF document text
    • http://febevolojezu.pbworks.com/f/86454028203.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b65a921-3fda-4708-8bcf-98a0e64ac694/sokovorezisibepalolex.pdfIn PDF document text
    • http://nebapelamive.pbworks.com/f/30099154568.pdfIn PDF document text
    • http://vonodatob.pbworks.com/f/fikujabudirenovoromof.pdfIn PDF document text
    • http://mifimoruzuwo.pbworks.com/w/file/fetch/144451134/wenozejewonuwosupukejise.pdfIn PDF document text
    • http://wufamazajo.pbworks.com/w/file/fetch/144464574/que_significa_soar_que_te_muerde_una_serpiente_amarilla_en_el_pie.pdfIn PDF document text
    • http://zeratuwolima.pbworks.com/f/gemilaxumasevu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82544815-9bc7-4d59-a504-8cfd8fab1e13/dell_monitor_20_inch_2007fpb.pdfIn PDF document text
    • http://jeselivid.pbworks.com/w/file/fetch/144503199/how_to_unblock_a_call_on_a_panasonic_phone.pdfIn PDF document text
    • http://dumunivuniv.pbworks.com/f/accuracy_and_precision_in_physics_quiz.pdfIn PDF document text
    • http://betosaxugawi.pbworks.com/f/76506025895.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_off0000d7a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7A4 5260 bytes
SHA-256: dc6818e37923220386eacee67b81b97055c7f578442f05e0956c093121fda22c
font_01_sfnt_off0000e993.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE993 10776 bytes
SHA-256: 74844d773c44ca42d84e7e64d75795bf08ca87fbf281e0ff95bedaeab1b135a6