Malicious PDF — malware analysis report

Static analysis result for SHA-256 a65aefccfde88b58…

MALICIOUS

PDF

74.4 KB Created: 2020-12-25 02:03:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 0b444e5193dd51a0cd820d66e9eb9d83 SHA-1: d7c003289365bf3e786fd4252edda900388ff496 SHA-256: a65aefccfde88b580fcdfd81cef3670f3aad790e12958e32f33654717db97959
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many of which are likely part of a link farm designed to manipulate search engine results. The primary URL, 'https://traffking.ru/aws?utm_term=what+animal+is+thundurus+therian+forme', suggests a lure to a malicious site disguised as a search result. While no scripts were explicitly extracted, the PDF structure and numerous external links indicate a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://traffking.ru/aws?utm_term=what+animal+is+thundurus+therian+forme PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4387932/normal_5fb2b6bc32a2c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380691/normal_5fe2e1dee5011.pdfIn PDF document text
    • https://cdn.sqhk.co/nalogigoke/igWnMAz/tiktok_login_without_password.pdfIn PDF document text
    • https://pogedufofow.weebly.com/uploads/1/3/4/5/134512351/diwogudivuxulewu.pdfIn PDF document text
    • https://viwijivawapel.weebly.com/uploads/1/3/4/4/134492302/tekex_wobofovonek_divanetam.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454990/normal_5fcf2dab81408.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423699/normal_5fbc320867f0b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492536/normal_5fcaf3b49334f.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/tevomenil/rdr2_companion_app_strategy_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/534163aa-9859-4191-800b-17a83fd4e584/50696486499.pdfIn PDF document text
    • https://s3.amazonaws.com/xesigeze/dialectical_behavioral_therapy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39492697-7692-4890-a026-4b4b07046c9c/descargar_musica_gratis_para_iphone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00233d9e-2f43-4bb9-834a-6ebd1b39da4a/12312251853.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44306ba4-2a78-4037-97c0-ca2c9b6a5f7a/pedigree_review_worksheet_answer_key_doc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c9e9e70-b291-4865-9784-0893e98a80e2/3984404046.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d725.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD725 3864 bytes
SHA-256: c638edf036ce0ae6569392a1e1a62a24ac323485b1197cd42493cb9fd10bb4d3
font_01_sfnt_off0000e4e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4E9 5160 bytes
SHA-256: 53e36b44e5dc5ff82dab4c8c3cfbe1df698e5e3dac4fd38becd1a453d89cc36a
font_02_sfnt_off0000f653.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF653 10752 bytes
SHA-256: d03dc380986e0eb89ea741d1c81b8c8792f97981ed13c413ce93718eade20521

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