Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d81449a8801875e…

MALICIOUS

PDF

76.5 KB Created: 2020-11-09 22:52:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: f970e99a32de36378ae60787a91dc0f5 SHA-1: b9d211f94f499b76adc2f635456e77cad4031118 SHA-256: 8d81449a8801875ed8f63b0b78ea551d0cf4a9171cb79c6527f1773daff549ad
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous links to external resources, with one specifically identified as a malicious redirector. The heuristic firings indicate a high likelihood of malicious intent, classifying it as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to a 'purchase and sale agreement'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ggtraff.ru/123?keyword=purchase+and+sale+agreement+nefar In PDF document text
    • https://cdn-cms.f-static.net/uploads/4376598/normal_5fa27b2f1922b.pdfIn PDF document text
    • https://kafasomawupi.weebly.com/uploads/1/3/0/7/130775431/9750844.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381988/normal_5f91bac903ad0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382618/normal_5fa91d444f3df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369491/normal_5f8a82e5e12c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383795/normal_5f8d3563dce72.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376371/normal_5f8f1a4e9794d.pdfIn PDF document text
    • https://dowazulipogopu.weebly.com/uploads/1/3/4/3/134322731/xeloxojofozal.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391001/normal_5f92c8ae7b0aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445889/normal_5fa967c21d38c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410714/normal_5f9f89399d676.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366312/normal_5f87341464b67.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/7d692b36-c400-4bac-97c9-29d9d1913514/13155979536.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e27d9de7-efc6-40a0-b6b0-09ef255fa890/vunijodow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe5aa34c-1045-45bc-a053-00c6a87e476e/18701642359.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6806706-ba69-49c5-9ee9-9fabe85e32e7/xuwumobufelusufi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d466.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD466 3284 bytes
SHA-256: 702e9443d34fbd3993034733c09e5d85844e1e20021f84b3fd32094dd6728a1c
font_01_sfnt_off0000e02d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE02D 5436 bytes
SHA-256: b8d579384f2e3591e1a828343e8a7f6ddba5e9b6b93151309a61263450119b0e
font_02_sfnt_off0000f282.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF282 16332 bytes
SHA-256: 9433ecf077c46ac44d973ff2ba3e185d051e7e1ead74147699f36a116d840b37

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