Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a58904ebaaff76c…

MALICIOUS

PDF

77.1 KB Created: 2021-03-08 10:09:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 0a1f4d985c833c067560f7f5c566a29c SHA-1: d097515c9f59b8b20f042fefd57ab3da4566dba4 SHA-256: 8a58904ebaaff76ced23fe14439f05e27163de9de791cf8abd03a4fe09e6f22a
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple external URLs, one of which is `https://botokaw.ru/wix?keyword=adventure+time+righteous+quest+unblocked`. The presence of numerous external links on disposable hosting suggests a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://botokaw.ru/wix?keyword=adventure+time+righteous+quest+unblocked PDF link annotation
    • https://cdn.sqhk.co/jopubelo/4Egf1hb/46058521452.pdfIn PDF document text
    • http://instapriz.website/xawuganibagkauax.pdfIn PDF document text
    • http://faxizila.iblogger.org/bugozapefovoxisepe.pdfIn PDF document text
    • http://save50it.info/niredawizufolenorrj6v.pdfIn PDF document text
    • https://cdn.sqhk.co/vamosopon/eQ3hck8/jabubipupiz.pdfIn PDF document text
    • https://cdn.sqhk.co/wexunaveb/jhihb1j/victory_day_ww2_us.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://4eff3ec4-d147-45d1-be73-876d9e1d0019.filesusr.com/ugd/efb3f0_7e4669d10b6e42c182e573ac80c4f4b4.pdf?index=trueIn PDF document text
    • https://e02212b7-c8ec-4bf5-ba3e-d68a1de675e0.filesusr.com/ugd/7f1d73_34b5226369d84829a558fbb8fcfdbce7.pdf?index=trueIn PDF document text
    • https://d4bcd744-2348-4fe3-9006-05b2fcbd3cbd.filesusr.com/ugd/704566_0e0704fda90e4e3b82667f12c4868340.pdf?index=trueIn PDF document text
    • https://ed59cdd8-0d75-4634-8bb2-7afdb9da103e.filesusr.com/ugd/9cb112_55c08b2df523490f96f9eddd93cab075.pdf?index=trueIn PDF document text
    • https://fc06435f-e709-4c80-b59d-96fa470c1a13.filesusr.com/ugd/bdc04d_e3f1d675f2954ed8bac15c5284c578a0.pdf?index=trueIn PDF document text
    • https://e0a971b2-7104-4718-9e5f-4f17d768618f.filesusr.com/ugd/6d43b6_2e224691251e4fcabd2d6ee0bb65a06a.pdf?index=trueIn PDF document text
    • https://4be8a7ba-6c9a-47a4-99fc-a5961b41a404.filesusr.com/ugd/132250_f0175c8c72f74c5289b58efbfcf575da.pdf?index=trueIn PDF document text
    • http://gazugitub.epizy.com/tilepebeja.pdfIn PDF document text
    • http://ribibepope.epizy.com/android_aes_cbc_example.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57560e5d-7b7a-4e12-9310-e75b6bcec51f/92236102869.pdfIn PDF document text
    • https://2a4065d7-883d-43e8-a524-7ce9aa4b4e88.filesusr.com/ugd/ccb1c6_ae745762d8c944eebc0194ac87d90530.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae822012-f0bf-43af-bd35-c61b57bed5a5/38177392459.pdfIn PDF document text
    • https://3df06c22-1e8a-4082-8cc2-a0fdc0609706.filesusr.com/ugd/d86e81_4cdd19d600e640c5805fa573194b3316.pdf?index=trueIn PDF document text
    • https://6762652a-e869-40f3-960d-1446d4066230.filesusr.com/ugd/55e6b1_126cd93b545149eaa0272910aac4431a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/aaaa2721-1db2-4a68-b3ac-e838e41041b9/are_mandalorians_from_mandalore.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_off0000ef67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF67 5524 bytes
SHA-256: a7b4f7a8570886400c78118c8c1fe2244c35600e5405bb3bee22d7496cf9920e
font_01_sfnt_off00010206.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10206 10932 bytes
SHA-256: 2e2afc530736c62076b620c9f29bf7bdf57903969af1c126c551e05598f785b6