Malicious PDF — malware analysis report

Static analysis result for SHA-256 dffc0d0c9c1db3d2…

MALICIOUS

PDF

85.4 KB Created: 2021-04-04 13:43:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 7220ce0f92dd0262cfcd5081b00db59c SHA-1: c58a6d6430eb87db1128e5d706a716a0e7836f9e SHA-256: dffc0d0c9c1db3d2132e8b83a1a82fab961d3c77c3127072e70279e2ebba04a8
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm used for phishing or malware distribution. The document body, though heavily obfuscated, appears to be a lure related to audio equipment setup.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://lozipotod.ru/aws?utm_term=onkyo+tx-nr838+atmos+setup PDF link annotation
    • http://rapoxarawiwalo.sportsontheweb.net/zofigusufune.pdfIn PDF document text
    • https://vixagukire.weebly.com/uploads/1/3/4/3/134364056/gimibobemabalefikov.pdfIn PDF document text
    • https://cdn.sqhk.co/depifozopupe/auYcgfU/patanjali_yoga_sutras_8_limbs.pdfIn PDF document text
    • http://fegiroxopirez.sportsontheweb.net/structural_aspects_of_antioxidant_activity_of_flavonoids.pdfIn PDF document text
    • https://likemojinefafus.weebly.com/uploads/1/3/1/4/131406739/kurebaw.pdfIn PDF document text
    • https://xamezorunag.weebly.com/uploads/1/3/1/6/131606231/nonizufukerolifob.pdfIn PDF document text
    • https://gidibaxatum.weebly.com/uploads/1/3/4/8/134889182/89244b19ca9ba27.pdfIn PDF document text
    • https://zaketedojerobi.weebly.com/uploads/1/3/6/0/136023974/13c66a06e0b.pdfIn PDF document text
    • https://cdn.sqhk.co/livixugakuf/Ivjatia/stickman_and_gun2_uptodown.pdfIn PDF document text
    • https://vinenuji.weebly.com/uploads/1/3/1/4/131453259/f5ebdf3.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/wenobagupexekap/zipif.pdfIn PDF document text
    • http://vesedakowata.onlinewebshop.net/rowilij.pdfIn PDF document text
    • http://durenifujogax.myartsonline.com/60113087565.pdfIn PDF document text
    • http://vorisenunajix.myartsonline.com/51521060491.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/665add80-34d3-4959-9805-76d47cf67217/kintera_jump_rope_for_heart_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/dakebesuvum/dil_chura_liya_video_song_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49aeaeb3-d115-41ec-bbfc-ad5e6f55c8ac/72701839846.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3173e344-87c7-40f0-9654-457f1446e4d3/52204034294.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_off00010e1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E1B 5584 bytes
SHA-256: ea5ffa6a8d9e5fcdb7bac37a92fd0adb289c4a470302fd2a50ad240132cadc7f
font_01_sfnt_off0001211c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1211C 11204 bytes
SHA-256: 1fb0fbc85d292f333294ddd63e9c6047330e725cfa63da2b24543edf064495cc

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