Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6cabeae50a651a5…

MALICIOUS

PDF

109.5 KB Created: 2021-03-17 21:26:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 574c798c48da348ad2f26d03c7d664d6 SHA-1: 58026cfa3e773b7b6ba26c62f700b96c16cdaeaa SHA-256: a6cabeae50a651a505993a7af9b414efbd67f91b322801854750f2c3dc12aefa
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or SEO manipulation tactic. One of the embedded URIs, 'https://maypoin.ru/wix?keyword=royal+high+school+football', is suspicious and likely part of the malicious infrastructure. The document's structure and numerous external links indicate an attempt to redirect users to potentially harmful content or facilitate further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/wix?keyword=royal+high+school+football PDF link annotation
    • https://cdn.sqhk.co/zuxeromewime/QNgfvia/zombie_age_3_hack_game_download.pdfIn PDF document text
    • https://wuremuzagatixob.weebly.com/uploads/1/3/4/6/134612401/395831.pdfIn PDF document text
    • https://gapurosudezejug.weebly.com/uploads/1/3/5/9/135965954/sovozuwere_lamikawagi_tinepe.pdfIn PDF document text
    • https://cdn.sqhk.co/femogefuv/hij18id/monument_valley_gameplay_no_commentary.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453579/normal_600cabb92a5f2.pdfIn PDF document text
    • https://wevejabunom.weebly.com/uploads/1/3/1/4/131406075/wijajafunutu_sesefabagojab_wikif.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384048/normal_5fecf3cc52ae7.pdfIn PDF document text
    • https://cdn.sqhk.co/zufuxirap/hfhaqib/bumik.pdfIn PDF document text
    • https://cdn.sqhk.co/noperizapewo/bijQubq/36619622923.pdfIn PDF document text
    • https://fewegako.weebly.com/uploads/1/3/1/4/131453302/d20a18738bc.pdfIn PDF document text
    • https://wemezixogasowed.weebly.com/uploads/1/3/1/6/131637562/wilenaneduvof.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389384/normal_6042d54359908.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/3ae65064-bcfa-4631-8d2c-5bba67b246ba/vishnu_sahasranamam_book_in_tamil_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/xofalepelala/dolupefasivoduweferat.pdfIn PDF document text
    • https://67a4337f-2b79-4d04-9c1d-2578c80f4945.filesusr.com/ugd/964009_8da5ca434bf841808c597744421c78ec.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f082db2a-311f-4a7d-99d3-f6b9ec1fa5b7/94156955569.pdfIn PDF document text
    • https://s3.amazonaws.com/safenalavojuwu/fufigabavaxat.pdfIn PDF document text
    • https://efe523a3-d756-4f55-ba91-412f3a718e00.filesusr.com/ugd/236571_8c004a7203e7417c984dff3415057a28.pdf?index=trueIn PDF document text
    • https://45f91bdd-2b68-4e60-ae2c-b14373ae5332.filesusr.com/ugd/0d089b_a90936c888d64ca48d51fb8db889ac74.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e019c2dd-1f96-418b-883d-a85606bcd419/what_is_the_purpose_of_the_worm_in_tequila.pdfIn PDF document text
    • https://94cb5446-44f7-499c-8ddd-8d9df3a2db3d.filesusr.com/ugd/9b9c26_9c3817a185fa4f4393e02cac9293fbd4.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000160b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x160B7 4860 bytes
SHA-256: 72b16853d366f55c690d6bcf8c9f7ff876f103f502bed793ba95302811a741b1
font_01_sfnt_off00017156.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17156 12436 bytes
SHA-256: 5a7cb5556df97d1974c942fb16010f74a93b47bb6567ae7eee519a4a9465404e
font_02_sfnt_off00019ac0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19AC0 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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