Malicious PDF — malware analysis report

Static analysis result for SHA-256 895e870cb8d8594c…

MALICIOUS

PDF

74.8 KB Created: 2021-05-20 14:09:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 08190c63393768454745a9fb7f6f35fb SHA-1: 279963335ed267b8e02557ab6bc4c4032212f2fe SHA-256: 895e870cb8d8594c99d9c4d7943ba6cf8ae75f4258ba1df5c7e5d55e60f69bfe
214 Risk Score

Malware Insights

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

The file is a PDF containing embedded links, with one critical heuristic firing indicating it redirects to known malicious infrastructure. The ML classifier and ClamAV also flagged the file as malicious. The document body, though heavily obfuscated, contains text related to 'reset genie remote directv', suggesting a lure for technical support or account recovery scams.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://yafferge.ru/strik?utm_term=how+to+reset+genie+remote+directv In PDF document text
    • https://jafedemigizol.weebly.com/uploads/1/3/4/5/134588438/befesomupowamux-xuberepi-pinesulekexifo.pdfIn PDF document text
    • https://duzozerijadid.weebly.com/uploads/1/3/4/4/134493401/4428584.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421050/normal_605b32eb19275.pdfIn PDF document text
    • https://fopozawiluni.weebly.com/uploads/1/3/4/3/134383369/4123b69777f513.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373757/normal_60602fbd06204.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495855/normal_5ff59b57db00c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406464/normal_5ffb3292b360e.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/ab8fb019-a0c2-4187-bad0-8dd5ae4321cd/what_is_the_importance_of_data_structure_in_computer_science.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92a1efe5-09c0-4075-844d-b3a7339818ab/bubonuxakigasopoze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d826a4c4-2a16-4745-b367-4ea4a7e9e1f1/tararotilotevosaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d21a67ec-a083-4b9f-8021-5a62a12ab64c/wukubipofabomejezux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/458fff25-7a07-42b3-a08f-d37b1c14e416/loxuwuxonod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9394b54-3bcd-439c-b038-79f77ee3484f/jowojuvixireri.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a413da62-ed7d-4e21-8960-24d11cf85fb5/how_much_would_a_dachshund_puppy_cost.pdfIn PDF document text
    • https://s3.amazonaws.com/sazariwapa/icebreakers_for_virtual_work_meetings.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fc3309a-a3ff-4a16-b2c3-cc39446284ef/femapugojum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/587e5c57-d0fc-4f1b-b730-58e6e6596e9d/the_idiot_fyodor_dostoyevsky.pdfIn PDF document text
    • https://s3.amazonaws.com/jipowumat/christ_college_school_uniform.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_off0000e89f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE89F 5132 bytes
SHA-256: 951af8fe655e98dadde4407a234d1cfbe794ee2a42d357cf4e6ce5a4b248c4fd
font_01_sfnt_off0000fa16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA16 10620 bytes
SHA-256: 46cbe09989d18a74e93a106cfbc260ee4fdaa79db39c8fdd12120e1fc7f0313a

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