Malicious PDF — malware analysis report

Static analysis result for SHA-256 208587b7cc09302e…

MALICIOUS

PDF

70.2 KB Created: 2021-03-08 11:49:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: b04aee6b62e4c5223560f88be4686be7 SHA-1: 666f5072561d3842c3e37ea69b477234d4781a22 SHA-256: 208587b7cc09302e809ae96485d8d7f985e2b5f6bc20e779b56d7ced2fdc920a
186 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics and a machine learning classifier as malicious, specifically as a phishing or trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. While no scripts were explicitly extracted, the presence of numerous external URLs indicates an attempt to redirect the user to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://dugedepap.ru/award?keyword=guia+autometrica+2020+pdf PDF link annotation
    • http://webdefilmizle.com/dulenexonemosidirotigulivlretl.pdfIn PDF document text
    • http://study-english-05.site/graco_fastaction_fold_click_connect_travel_system_car_seat_installationo9v8a.pdfIn PDF document text
    • https://cdn.sqhk.co/giwitosak/brjgogf/sonic_toon_island_adventure_3ds.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390071/normal_600a02fe5ec76.pdfIn PDF document text
    • https://farejebizaf.weebly.com/uploads/1/3/0/8/130815013/4266548.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451045/normal_5fdc8714d24b1.pdfIn PDF document text
    • https://lefipejime.weebly.com/uploads/1/3/4/6/134668800/jagodozugiv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485822/normal_5ffd70be5bb36.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450870/normal_6019d61b72f9d.pdfIn PDF document text
    • https://pezujereg.weebly.com/uploads/1/3/5/3/135349759/6290f1829a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446166/normal_6022ee5f1bab3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445726/normal_5ff0c275399f9.pdfIn PDF document text
    • https://cdn.sqhk.co/gesimefav/bAhd9ih/hi_cooking_mod_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486051/normal_6033c4eb5d3ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490528/normal_6018a6d7532af.pdfIn PDF document text
    • https://jatomotubaw.weebly.com/uploads/1/3/0/7/130739460/rawupupotuxek.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452173/normal_601f1dd2ab327.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412889/normal_5fcb43dff1cf1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000c7cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7CB 5396 bytes
SHA-256: fac6b40fc27980920e687ce3e299a49fdd67a3ee4355e4688997d1647a5ebec9
font_01_sfnt_off0000da16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA16 15292 bytes
SHA-256: 769d2339e374c1d9e272826923a42b3c158893554c579031de3a1df2c18dcea7

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