Malicious PDF — malware analysis report

Static analysis result for SHA-256 45961853a2adcb13…

MALICIOUS

PDF

82.4 KB Created: 2021-03-25 05:53:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2ec12ad4b15273f74ee5f9f70cab982f SHA-1: b9529945f36185d1ff067a40603559d7a4727493 SHA-256: 45961853a2adcb13467c2e870b652ab5bdd87f2dfc1f77614afdd70f43444870
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, suggesting a phishing or SEO spam campaign. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing. Although no scripts were extracted, the presence of numerous external URLs points towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://xezojetit.ru/123?utm_term=rogers+tv+channel+guide+brampton
    • http://themarkuzmusic.com/personal_development_plan_example_for_care_workerszbl0c.pdf
    • https://gozezitigaja.weebly.com/uploads/1/3/4/3/134340412/6054799.pdf
    • https://visofebofoxofub.weebly.com/uploads/1/3/0/8/130814652/vabuwalol_nevubi.pdf
    • http://jedugefipevama.iblogger.org/phone_caller_location_tracker_app_for_android.pdf
    • http://chatik85939775.fun/16898038711hnl6f.pdf
    • http://tendernes.ru/tafajikonh7soh.pdf
    • https://fedonofawok.weebly.com/uploads/1/3/4/8/134881994/6597676.pdf
    • https://pakitaxe.weebly.com/uploads/1/3/4/3/134318313/6125991.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://modewomidoxiva.epizy.com/you_re_the_reason_piano_sheet_music.pdf
    • https://uploads.strikinglycdn.com/files/a679a51d-eade-4151-a849-a1fcfba18701/42847081926.pdf
    • https://uploads.strikinglycdn.com/files/bb5489a1-9718-4ee6-abee-83198bd5caf3/pexaruvamaju.pdf
    • http://polebofoxajiras.rf.gd/immanuel_kant_books_list.pdf
    • https://d7179dab-c972-4501-9f4a-16044ca71e84.filesusr.com/ugd/434f74_33e3b0ed83ae4f88b463098fbc55b4f5.pdf?index=true
    • https://uploads.strikinglycdn.com/files/4b7c1e8e-099c-463a-b163-315646a0d98e/life_insurance_company_meaning_in_hindi.pdf
    • https://4eb83289-b313-4542-b68c-79a1d4783db4.filesusr.com/ugd/f6336d_53e8479dfd8d4d82acb7521e5d31ec6c.pdf?index=true
    • https://aa514bbb-a96e-4bc9-8ff3-0ca2edd1104f.filesusr.com/ugd/3fc21f_a7bb8cbb85b84743b3cb7f5124d301dc.pdf?index=true
    • https://uploads.strikinglycdn.com/files/091858e5-6f6c-49bf-8a1a-ed00b7f3c5db/32450144113.pdf
    • https://51364a6b-283d-4537-b9df-48522fd8faf2.filesusr.com/ugd/921180_bf61d53100e94866bf451fc4710a647c.pdf?index=true
    • http://kexomuradalo.rf.gd/80245729686.pdf
    • https://uploads.strikinglycdn.com/files/373bb52e-9289-4848-a500-70ccd5ca57cc/4777279559.pdf
    • https://uploads.strikinglycdn.com/files/f54ba5c8-20f9-45d4-a83e-233fe95a7fcc/easy_crochet_baby_sneakers_for_beginners.pdf
    • https://uploads.strikinglycdn.com/files/8d32fb76-7da9-47e0-831b-19fca7654b20/mopugesipuri.pdf
    • https://a539eca0-ed6d-4e39-a9fd-63162facd464.filesusr.com/ugd/8170ee_527d3bfb1e9c45b19621e7cce9a12d84.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff1c.bin
13e9f32fc13f1579421cc34a09fa98fe3766b7196cfa50295a70881c28f01479		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF1C 5696 bytes
font_01_sfnt_off0001125e.bin
bbcb331bd92bc3a4dc0197dc17ed36067f1753645a0dd323ef96897dd5877533		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1125E 11652 bytes

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