Malicious PDF — malware analysis report

Static analysis result for SHA-256 184ce7d030239295…

MALICIOUS

PDF

103.0 KB Created: 2021-03-21 09:25:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 05f5846e4ee35d3c91748e6850284656 SHA-1: a5a7747825801cf2774466b70d107d177cc46c83 SHA-256: 184ce7d0302392954a7f72875b6848560407355aac3f88e7af75e291fa62274c
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many of which are hosted on disposable domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links point towards an attempt to redirect users to malicious sites, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://zajinet.ru/award?keyword=amplitude+modulation+types+pdf PDF link annotation
    • https://cdn.sqhk.co/zixifazod/5lgggg1/flowers_language_dictionary.pdfIn PDF document text
    • https://jidegumot.weebly.com/uploads/1/3/0/7/130776526/1556898.pdfIn PDF document text
    • https://forupiwiwipugo.weebly.com/uploads/1/3/5/3/135349306/1099bf36f61797c.pdfIn PDF document text
    • https://lubawefajisewo.weebly.com/uploads/1/3/4/4/134443910/panegewom_xuwolagomip_xidirajer_pitixowaxakere.pdfIn PDF document text
    • https://kodopexo.weebly.com/uploads/1/3/4/6/134693050/dadararalumov.pdfIn PDF document text
    • https://cdn.sqhk.co/remigalakefo/zjchcig/wiwububobufelu.pdfIn PDF document text
    • https://cdn.sqhk.co/zumufapofow/fBcHYii/71322370411.pdfIn PDF document text
    • https://cdn.sqhk.co/jofijoju/f9Egjke/zekubago.pdfIn PDF document text
    • https://gogabaxada.weebly.com/uploads/1/3/4/8/134852864/0ca2bad.pdfIn PDF document text
    • https://cdn.sqhk.co/dufukeraj/jidjhig/freedom_doom2_wad_download.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/14f6da09-f82b-4216-a073-2286c8740db6/burger_king_2_for_6_mix_or_match_commercial.pdfIn PDF document text
    • https://0e8f88b9-656e-4b05-9cd8-8bd477f85547.filesusr.com/ugd/95b9ea_b716e78452414459954d0ba80093cdf7.pdf?index=trueIn PDF document text
    • http://rinexijirava.rf.gd/begupetawu.pdfIn PDF document text
    • https://21a67f6d-2aea-439f-a910-ed4feb6be009.filesusr.com/ugd/173616_212903a0d2ba4d5cafc35bfd226b3e95.pdf?index=trueIn PDF document text
    • https://eef50eb5-c47c-47bf-9843-15c7823b5fde.filesusr.com/ugd/e54fc7_9784b9e667eb4fb7b76694636859bbf1.pdf?index=trueIn PDF document text
    • http://nekofixas.rf.gd/75313551325.pdfIn PDF document text
    • https://ff4d9611-e7ea-45f2-85d3-f0b464ef817f.filesusr.com/ugd/48f461_d1b4658a9eaa404a9948aad4ceb0dae9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/90244475-d427-4bcf-903a-90b4708f3662/11389497847.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93f0926d-9e45-45b0-b8c4-6bde95b7b6b2/fagawaleg.pdfIn PDF document text
    • https://3b044092-e341-4c69-a8e2-52b14fc1865f.filesusr.com/ugd/370021_65dfe007ea714020b7e468cb2e30d521.pdf?index=trueIn PDF document text
    • http://riwigov.rf.gd/69655681257.pdfIn PDF document text
    • https://7f06b679-e14d-4525-8955-d56a7cf6f710.filesusr.com/ugd/79e5df_9ce022f230e84172be87750e48418a0e.pdf?index=trueIn PDF document text
    • https://9fbeb193-358d-48fe-b9d9-45f8b63f6b3c.filesusr.com/ugd/ab67b9_7adca122c8024a209b5a0be8339c14f1.pdf?index=trueIn PDF document text
    • http://waxetip.rf.gd/bitter_sweet_symphony_partitura_violino.pdfIn PDF document text
    • https://a86a6b26-b473-4b55-b9aa-7628a2bff077.filesusr.com/ugd/4f270c_26c87fb5f8394f98ba5403bed470a3b7.pdf?index=trueIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013e55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E55 5184 bytes
SHA-256: 8165baba15dba9fcdb0459eb609ee0f82f597f91b0206646556a454db218f3d8
font_01_sfnt_off00014ff4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FF4 12296 bytes
SHA-256: 88d74beac0da14826305aea503df55eafc3354f39392de0865f98e7c46df1f34
font_02_sfnt_off000179a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x179A1 16036 bytes
SHA-256: 52db30b66cfb76898988bc7c6ed152514c301740808ab95bec9c68e49df23550

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