Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0811e9676ca442d…

MALICIOUS

PDF

75.5 KB Created: 2021-03-08 11:01:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 8f1ea8558318699797603a678c046a42 SHA-1: 2740fd6611edd7c0cbc4e0a63e8ff6c81ac3278f SHA-256: e0811e9676ca442d200250edff7942c59822c54d515420ec1b08735ad63a2ddc
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one prominent URL leading to a suspicious domain ('golowaki.ru') that is likely part of a phishing or malware distribution scheme. The document body, though partially garbled, suggests a lure related to application availability, aiming to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 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://golowaki.ru/strik?utm_term=why+is+procreate+not+on+the+app+store PDF link annotation
    • http://vuzuwul.getenjoyment.net/wavepunovepasawe.pdfIn PDF document text
    • http://minosijasif.mypressonline.com/15290481824.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370778/normal_6029990b54496.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465924/normal_6042e0ac243a4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379359/normal_5ff69cafb7a85.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/guvovigo/34274806828.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fe2612c-ccb1-4ecb-9bb4-7220de4d977b/46035545315.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eca772b7-28f0-4685-9f76-c4aae08b3763/bexaxebonalafi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28af3978-029e-454e-aff1-06df9908352c/59919432403.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85bb3213-a299-4149-90d4-9f0532cb3c45/88538771607.pdfIn PDF document text
    • https://s3.amazonaws.com/sewamos/44442241147.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13714b34-7e22-4c52-9529-d8fe99de9fd6/cfa_exam_level_1_registration_deadline.pdfIn PDF document text
    • http://wenares.myartsonline.com/what_is_the_significance_of_the_title_she_stoops_to_conquer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f95a9cc-1c00-4aa0-9f35-2f97aa559bd7/sole_e35_elliptical_owners_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/wujapu/zidusomaliban.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e765284b-325b-497b-94bc-27e1ce178aec/how_to_draw_cartoon_eyes_for_beginners.pdfIn PDF document text
    • http://widepidaba.atwebpages.com/gatevik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57564a68-bd0e-4be4-bc69-fb2824b0e892/4427266748.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98e24c1b-17a3-4a44-9310-93c61f2be555/how_much_does_it_cost_to_renew_drivers_license_in_ok.pdfIn PDF document text
    • https://s3.amazonaws.com/napisakaluja/adaptation_in_animals.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1620359b-072c-4046-9afc-7e432471ccbd/junizapudatudu.pdfIn PDF document text
    • https://s3.amazonaws.com/sugowubuf/71761677729.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_off0000ea2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA2B 5104 bytes
SHA-256: 8f65ce57396bfdf48465a9d82267346054ee90149c427b6b85c225e4aa83c24f
font_01_sfnt_off0000fb98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB98 10676 bytes
SHA-256: d1e05c85a298181a8660c5d88cdf702a92b9314b5fec227ed1db64e3f13d4448

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