Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7bc85b307d1b12c…

MALICIOUS

PDF

79.6 KB Created: 2021-01-03 13:23:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 1713c41c599712aedeeb95ae26de5a8f SHA-1: df53b6d91d91988e3ed0df6f6cc0fdf555365ca0 SHA-256: a7bc85b307d1b12c27044d8c61a0a7f50195368b7e412ae32614e1df48052129
214 Risk Score

Malware Insights

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

This PDF file was flagged by multiple critical heuristics as malicious, including a redirector link and a link farm. The ML classifier also assigned a high probability of maliciousness. The embedded URLs suggest the document is part of a phishing or malware distribution campaign, likely using the 'investment plan template' lure to entice users to click on malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/aws?utm_term=investment+plan+template+pdf In PDF document text
    • https://petizigosi.weebly.com/uploads/1/3/4/9/134903326/pudezevimefiw_bojurexi.pdfIn PDF document text
    • https://cdn.sqhk.co/wazewiput/fHihdij/badlands_hunting_discount_code.pdfIn PDF document text
    • https://cdn.sqhk.co/miwizawi/TjacEii/dragon_ball_legends_hack_no_verification.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482853/normal_5fc3182e22dcb.pdfIn PDF document text
    • https://cdn.sqhk.co/sukurorezib/dIhcicj/54276119414.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387590/normal_5f9c2bd8af9bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485161/normal_5fad4a3b71487.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366022/normal_5f87092dd09ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376878/normal_5fb74d762614c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/39b69a93-dd42-41a1-a3d5-f5107262d46b/powidewiwo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04613f96-c907-44fa-9ceb-f416c6c76b4a/7-5_solving_trigonometric_equations_worksheet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6984c2c4-b669-4013-80a0-c8e018565326/wakelubaja.pdfIn PDF document text
    • https://s3.amazonaws.com/bokelur/begixibod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/864b012e-e59a-460f-a7fc-f35626a92259/the_time_travelers_wife.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_off0000fc0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC0C 5088 bytes
SHA-256: d1abc3f8def8d1d23a29d919849b42b2b5a0b31562a22f3aa3bf746f304aedbf
font_01_sfnt_off00010d54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D54 10720 bytes
SHA-256: 310f99e9d2a61bf4d9e59f28b5baf4ad8cbd63ec6b3fc81cea22d2748a6463d3

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