Malicious PDF — malware analysis report

Static analysis result for SHA-256 1111a63e536f1ac6…

MALICIOUS

PDF

71.4 KB Created: 2021-01-21 21:33:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 2a9fc40bfb85a5817617af93dc640f19 SHA-1: d42b36bd08b1b6825885ceb71c4b01a62c7739f0 SHA-256: 1111a63e536f1ac60b4a4b30d34429f06cf707922b8056212ccfff3ee570c5a7
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains a large number of external links, suggesting a link farm or SEO manipulation tactic, with one URL pointing to a suspicious domain. The document body is heavily obfuscated, but the presence of numerous external links and the high ML score strongly suggest malicious intent, likely to redirect users to malicious sites or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafficel.ru/123?utm_term=horseless+headless+horsemann%2527s+head+price PDF link annotation
    • https://cdn.sqhk.co/jilebodetifa/SLghgdB/blackpink_songs_and_lyrics_offline_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/bolukawet/dyxWid8/9617562992.pdfIn PDF document text
    • https://site-1197523.mozfiles.com/files/1197523/kali_linux_wifi_hacking_tutorial.pdfIn PDF document text
    • https://bumarotijij.weebly.com/uploads/1/3/4/6/134688095/nototoguwagogirobi.pdfIn PDF document text
    • https://gilinolejokakis.weebly.com/uploads/1/3/4/6/134632374/lebanovereg.pdfIn PDF document text
    • https://fifeguku.weebly.com/uploads/1/3/4/7/134733895/2963921.pdfIn PDF document text
    • https://cdn.sqhk.co/kagelemovo/hyjfnwB/magus.pdfIn PDF document text
    • https://duzonaxur.weebly.com/uploads/1/3/4/0/134012347/fikisow.pdfIn PDF document text
    • https://bodujifoji.weebly.com/uploads/1/3/5/3/135394102/2656902.pdfIn PDF document text
    • https://xowunaxevome.weebly.com/uploads/1/3/4/6/134679103/1262846.pdfIn PDF document text
    • https://dodapufil.weebly.com/uploads/1/3/0/8/130813701/sigarulid_rirupidawep.pdfIn PDF document text
    • https://zupagefu.weebly.com/uploads/1/3/1/0/131070313/8028842.pdfIn PDF document text
    • https://cdn.sqhk.co/gadukupuwe/hhi7icS/tedoxobafarof.pdfIn PDF document text
    • https://zasetumodoroba.weebly.com/uploads/1/3/4/6/134692621/57d052eb.pdfIn PDF document text
    • https://wetusaseri.weebly.com/uploads/1/3/5/2/135297966/buvuxu.pdfIn PDF document text
    • https://cdn.sqhk.co/sekeniti/RZanSCG/movie_quiz_ultimate_level_13.pdfIn PDF document text
    • https://nabidojanafo.weebly.com/uploads/1/3/4/4/134455463/pewewupejamos.pdfIn PDF document text
    • https://site-1195792.mozfiles.com/files/1195792/dunkleosteus_skull_for_sale.pdfIn PDF document text
    • https://cdn.sqhk.co/wepenujofow/hijhhf4/xobifuzetatutaliwojita.pdfIn PDF document text
    • https://devigejijakefu.weebly.com/uploads/1/3/2/7/132740662/mimafefo.pdfIn PDF document text
    • https://litodamun.weebly.com/uploads/1/3/4/7/134710511/nirorudopo-vozeneretoxofav.pdfIn PDF document text
    • https://zotorakiv.weebly.com/uploads/1/3/0/7/130739478/1550269.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_off0000d7a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7A9 5308 bytes
SHA-256: 42a982951b451e6a4b765c3c081710d94a58ca292353faa6dd1ca55fe6166741
font_01_sfnt_off0000e991.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE991 10680 bytes
SHA-256: 1be7ee6298a71e5757ad2de4e23cc3059fe999594fe86d1cad7aea3539e5ec8b