Malicious PDF — malware analysis report

Static analysis result for SHA-256 a18f0de6b35337ce…

MALICIOUS

PDF

76.7 KB Created: 2021-03-05 19:42:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 573ffa50f4857f43d044778dd4519018 SHA-1: 329c7b37c2acb6c602701f7cb86bc774903aa535 SHA-256: a18f0de6b35337ce96d8aed74e3f73ce0610ce4143f15bc146040857d9c8e46c
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, forming a link farm hosted on disposable domains, which is a common tactic for phishing or distributing malware. The primary URL, 'https://maypoin.ru/wb?keyword=xbox%20one%20controller%20walmart%20camo', suggests a lure related to a product search. ClamAV detection and ML classification strongly indicate malicious intent, likely involving the exploitation of PDF vulnerabilities or social engineering to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://maypoin.ru/wb?keyword=xbox%20one%20controller%20walmart%20camo PDF link annotation
    • http://xulodol.mygamesonline.org/muwekemonaxexofubumawik.pdfIn PDF document text
    • https://gibekadizekuni.weebly.com/uploads/1/3/1/4/131452913/2067738.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425913/normal_5feb294acfbfc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452607/normal_6007ea93630f2.pdfIn PDF document text
    • https://kuwuvolabakeg.weebly.com/uploads/1/3/1/4/131407812/5749018.pdfIn PDF document text
    • https://siputewebototab.weebly.com/uploads/1/3/4/4/134480832/34a114bd5b03d.pdfIn PDF document text
    • http://zipubezexupoka.mywebcommunity.org/63666853589.pdfIn PDF document text
    • https://zodebosamu.weebly.com/uploads/1/3/4/4/134444592/0466f18fb.pdfIn PDF document text
    • http://ziposodepow.mywebcommunity.org/5635207718.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408721/normal_5fff73c1d2645.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4529780/normal_5ff5496febc69.pdfIn PDF document text
    • http://nemugub.mywebcommunity.org/40_rules_of_love_rumi.pdfIn PDF document text
    • http://tuvivukaroj.mygamesonline.org/55919270117.pdfIn PDF document text
    • http://dipazekonowa.mypressonline.com/xexavorivasufotedi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c4e42e93-254c-4ba8-b495-737f84002742.filesusr.com/ugd/ddb60a_d21a3cf188dc4efcbcbc5fc4c6b6fcbf.pdf?index=trueIn PDF document text
    • https://ca483b97-61ac-4196-bca0-6b249c18eca9.filesusr.com/ugd/b27199_6c5e205af66e4b49a6e00dd60e5191f5.pdf?index=trueIn PDF document text
    • https://48bd7725-9370-4d18-884e-e75d7b70c9c4.filesusr.com/ugd/f241d9_6bf892ad40c3412883b837d82943700f.pdf?index=trueIn PDF document text
    • http://suvalomimo.atwebpages.com/from_dusk_till_dawn_quentin_tarantino_trailer.pdfIn PDF document text
    • https://98748e4b-3258-471a-903e-8ea98415cca0.filesusr.com/ugd/fd7405_249e01bbc9d44ba38adf64e6485ed5e5.pdf?index=trueIn PDF document text
    • https://35057dd6-1d18-4acd-96c9-af3b7fddc7cd.filesusr.com/ugd/978dd5_c64c6f5f49124d4cbabc489412a65408.pdf?index=trueIn PDF document text
    • https://b3079848-b07e-4d89-9244-05dfa5dd91fe.filesusr.com/ugd/3ab5ed_2fb459a5e843437faba814ccb2042425.pdf?index=trueIn PDF document text
    • https://5e0c4d4d-41f9-428c-9564-b93e7cff6769.filesusr.com/ugd/510691_74de85f04f1746798d30dc5bccea7b74.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE8A 5044 bytes
SHA-256: 6f1a4941b63a08136d9ceeb2f0d8ecb11b842ad338418042a9cf595131132d46
font_01_sfnt_off0000ffb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFB3 11652 bytes
SHA-256: 88f97cd1a7d2ebcf289f53c2fed3fb71fdf6e0f1921d8c9d387c16f5709a12d9