Malicious PDF — malware analysis report

Static analysis result for SHA-256 769ad68251897e6a…

MALICIOUS

PDF

86.6 KB Created: 2021-05-01 04:51:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: ac622e81818c8bdd101da5b15e463a7c SHA-1: d835cea6ef9bac2a46dd4b3accd2a1467c67cf6f SHA-256: 769ad68251897e6a28ef178e6eb38fd4cb4116be6ce44b8d7d43391fa7f110b8
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://ponafet.ru/strik?utm_term=maze+runner+4+full+movie+download+in+hindi+480p PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4501962/normal_60394dcf4a062.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456705/normal_6034ec30aca44.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420752/normal_600a0c2a6119f.pdfIn PDF document text
    • https://bozobamawokoruv.weebly.com/uploads/1/3/4/3/134350924/tobafaxuxapa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385410/normal_5ff3cc441d1e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369168/normal_604b728b9051e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393908/normal_606d500b34569.pdfIn PDF document text
    • https://dudisavaw.weebly.com/uploads/1/3/1/3/131380109/8604215.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499629/normal_600c9a2e537bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471109/normal_601a40bae9df1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383916/normal_604fb2b378a43.pdfIn PDF document text
    • https://zalopajozi.weebly.com/uploads/1/3/1/4/131453352/xazesekororipe_zogovi_pexowowesoletu.pdfIn PDF document text
    • http://lnstagramcopyrightcenter.com/what_are_dynamic_tension_exercises4oz4h.pdfIn PDF document text
    • http://eduha.online/55248361529euyf7.pdfIn PDF document text
    • https://fizegebukuri.weebly.com/uploads/1/3/1/4/131453213/kixuvamasopekeguxoza.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387939/normal_5fd6442ee5f29.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382949/normal_601bb0ea2552c.pdfIn PDF document text
    • https://wirevoge.weebly.com/uploads/1/3/1/8/131856771/1b11efe0029.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485826/normal_606a74d0dc258.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tokudapele/91065641771.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisi/86262595469.pdfIn PDF document text
    • https://s3.amazonaws.com/mubemutolewe/xorifumarerexazomifu.pdfIn PDF document text
    • https://s3.amazonaws.com/kelukakeb/77465213317.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF69 6744 bytes
SHA-256: b29f9350a720d2da9dc50567d08c4a82684db1fcb28a47e3a5788345b392d808
font_01_sfnt_off0001001d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1001D 2912 bytes
SHA-256: f1585241b59a1002e627af24859d8bddc2a41f5101ead6a7a290360bc82d6b36
font_02_sfnt_off00010a82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A82 5736 bytes
SHA-256: f42f2ac7cfe39d59a109cdc4d029221da86974c4850b0663b39b0ea0240914fb
font_03_sfnt_off00011e11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E11 13592 bytes
SHA-256: 75980d44bf11fa4e95bb93c2de4ec25b910e644ff9642fcd63119924d7472245