Malicious PDF — malware analysis report

Static analysis result for SHA-256 689846b5f7dcf279…

MALICIOUS

PDF

80.1 KB Created: 2021-05-11 09:41:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 275bb6150bf1161a9c5cb01179e0b71f SHA-1: fbb11b6d5b6ca61f0a11c910394a6002ccccafc8 SHA-256: 689846b5f7dcf279b5b87400bc67c6dce807ea384f6846671e8a1418f5c72b66
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting it functions as a link farm for phishing or malware distribution. The document body, though heavily obfuscated, appears to reference 'Samsung steam vrt plus sc code', likely a lure to direct users to malicious URLs such as https://ponafet.ru/strik?utm_term=samsung+steam+vrt+plus+sc+code.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://ponafet.ru/strik?utm_term=samsung+steam+vrt+plus+sc+code PDF link annotation
    • https://cdn.sqhk.co/vunebapenuj/jf1MaC2/recharge_nepal_ntc_from_australia.pdfIn PDF document text
    • https://tikofasej.weebly.com/uploads/1/3/4/6/134615027/17037e20d6f7710.pdfIn PDF document text
    • https://cdn.sqhk.co/feguzuvubut/gjeZ5ie/nosax.pdfIn PDF document text
    • http://naligixe.getenjoyment.net/82760659949.pdfIn PDF document text
    • https://barobinamad.weebly.com/uploads/1/3/4/7/134756413/sodepe_dofuvuzem_pasalolobi_delavoxi.pdfIn PDF document text
    • https://birifisak.weebly.com/uploads/1/3/4/4/134493055/xujelemu_mebiza_wolutomovet.pdfIn PDF document text
    • https://luvepuxoworusoj.weebly.com/uploads/1/3/4/6/134660421/tuzenaruwelo-mejukubutiv.pdfIn PDF document text
    • https://dusukipujadun.weebly.com/uploads/1/3/1/4/131437174/bimesepulo-bogaris-misepuva.pdfIn PDF document text
    • https://cdn.sqhk.co/nomitusibop/cicyheK/birthday_cake_ideas_for_mom_and_dad.pdfIn PDF document text
    • http://xitawefavam.medianewsonline.com/nupamaxutedanow.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nopugorib.onlinewebshop.net/40468407925.pdfIn PDF document text
    • https://2a082fd4-e93f-4b8e-9e59-408fa046b31c.filesusr.com/ugd/e334dd_d57292b3cec545fba0ca92082eaa6f76.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vebogotexaf/zibasusa.pdfIn PDF document text
    • https://6ddb26ad-aa8e-4a3e-a925-5cef6fc035e1.filesusr.com/ugd/d3d820_056fd098a7af4c31a3617b19b2979a08.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dalava/milestones_menu_nutritional_information.pdfIn PDF document text
    • https://0fecb50d-c8db-4b5c-a67e-01a13b1c0e9a.filesusr.com/ugd/da7c2d_c08c1caf02da4e7397a23efddf7be795.pdf?index=trueIn PDF document text
    • http://minivenema.atwebpages.com/python_programming_language_download.pdfIn PDF document text
    • https://s3.amazonaws.com/libosokune/die_kleine_raupe_nimmersatt_text_zum_ausdrucken.pdfIn PDF document text
    • https://ca3ec1ac-6ff7-4c8f-ae0f-86a30d86e335.filesusr.com/ugd/3615fb_c48e5c536ce748c886aec320458b4f04.pdf?index=trueIn PDF document text
    • https://88bec3ce-9cdd-4818-a95b-bcf8ac49d1e7.filesusr.com/ugd/72df48_ee548c42fb5043da9e1297e76ed367b3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jixeremipet/gupizebaxebid.pdfIn PDF document text
    • https://3745348a-78a0-42d7-8ff4-af2b45bf5faf.filesusr.com/ugd/02631b_9d5b587eaf2c405a8134ba650ba61dfa.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wazagidonux/english_speaking_learning_for_beginners.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_off0000eeeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEEB 5556 bytes
SHA-256: 8390bc075a9fb42ef180a27439895a4ccb8533cb50743a5fa2a1099428635e79
font_01_sfnt_off000101c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101C3 21076 bytes
SHA-256: 94cda7977e86f336df2ad8cc99efb9cf223655c5c988d274775c728a3b827b48

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