Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e7a78ffb9801165…

MALICIOUS

PDF

73.4 KB Created: 2021-03-16 23:01:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 63cdf7ac55b9a5df5f80dd83c2a91af2 SHA-1: ce56fd5c7eb6e379d1ce15772972fd5da3743212 SHA-256: 6e7a78ffb9801165c0cc21abd1bf13ce1a369d48cf92c795a6a85c19b65a1748
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm used for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious activity, likely leading to a phishing page or a second-stage download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://dugedepap.ru/123?utm_term=kamyab+jawan+program+online+application+form PDF link annotation
    • https://cdn.sqhk.co/kekelivig/iiiehbb/13369796978.pdfIn PDF document text
    • https://cdn.sqhk.co/nawovoso/phiifxt/49647866346.pdfIn PDF document text
    • https://rigegafotu.weebly.com/uploads/1/3/0/7/130740045/kavifeba.pdfIn PDF document text
    • https://cdn.sqhk.co/kujexelorite/qnhaghH/ark_survival_evolved_pc_cheats_weight.pdfIn PDF document text
    • https://cdn.sqhk.co/kewukapugino/m7ADdfT/watercolor_brush_lettering_printable_practice_sheets.pdfIn PDF document text
    • https://cdn.sqhk.co/woragumokewi/QbjaNLw/lg_xboom_rk7_price_philippines.pdfIn PDF document text
    • https://cdn.sqhk.co/nesuxozajek/fhhJieX/nail_designs_2020_acrylic.pdfIn PDF document text
    • https://latapelubatute.weebly.com/uploads/1/3/5/9/135960370/b07cbeab14c6b1.pdfIn PDF document text
    • https://bonesinidojesu.weebly.com/uploads/1/3/4/5/134591006/e4061e.pdfIn PDF document text
    • https://cdn.sqhk.co/xamapetarel/TENgdiC/mukipovoraretifezamol.pdfIn PDF document text
    • https://kibanelamuvudu.weebly.com/uploads/1/3/0/9/130969844/galofobewovejubolo.pdfIn PDF document text
    • https://cdn.sqhk.co/navimoxa/hMjcheK/ice_cream_roll_maker_toy.pdfIn PDF document text
    • https://cdn.sqhk.co/lekabadixi/sjiQHjh/16303268880.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/e776c8d0-927b-4974-ac53-280295b9a3cd/woods_l59_belly_mower_belt_routing.pdfIn PDF document text
    • http://zexumujadabexu.epizy.com/jetaxuvezuwufawupin.pdfIn PDF document text
    • https://s3.amazonaws.com/defujo/borg_warner_t10_rebuild_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/698ff309-c601-4bfb-9df7-67521e5365e1/93722163276.pdfIn PDF document text
    • https://s3.amazonaws.com/towakog/how_to_block_calls_on_att_cordless_phone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85106902-b993-4b67-b2a5-afd7db4f4599/graco_click_connect_35_expiration_canada.pdfIn PDF document text
    • http://mepulufe.epizy.com/11642151804.pdfIn PDF document text
    • https://s3.amazonaws.com/vitelitubovuluj/1673970664.pdfIn PDF document text
    • http://juvugevumeki.epizy.com/best_fe_electrical_exam_prep_course.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_off0000de31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE31 5536 bytes
SHA-256: 07039fe88a2315ffc31026f8c7fdb6cf846d0d0816ad35fffe1e97c4ceb085a3
font_01_sfnt_off0000f11d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF11D 11312 bytes
SHA-256: 7360b23e4d9b911e8f32f5111e273f7eea1de6819c441968e49924955e16530d