Malicious PDF — malware analysis report

Static analysis result for SHA-256 db9625ba1de60724…

MALICIOUS

PDF

47.2 KB Created: 2020-10-27 11:02:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: f6ffb46e34f67db59439ea1870bbed8b SHA-1: 80e73eba4c7232407d6ac03551e23f27f5ebdc2f SHA-256: db9625ba1de6072414ca4625db8fcedd86b0f99efc60bd57cddcac0b3132a67d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, including one identified as a malicious redirector. The document body, though heavily obfuscated, contains text suggesting a lure related to 'modern physics kenneth krane solutions' which points to the malicious URL. The presence of a link farm and a critical heuristic firing for a malicious redirector strongly indicates a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://cctraff.ru/strik?keyword=modern+physics+kenneth+krane+solutions In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365600/normal_5f8848ae007d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383918/normal_5f90ae7baae6a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371799/normal_5f8b917f3841e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371814/normal_5f926bb0b7dbb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368471/normal_5f8af81db61ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366949/normal_5f8d4a8357815.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368747/normal_5f87ead684a0d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367019/normal_5f8743544fced.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/zerejibixupav/fotinawotijiwalalu.pdfIn PDF document text
    • https://s3.amazonaws.com/wavunot/sasexuf.pdfIn PDF document text
    • https://s3.amazonaws.com/jiguwuzobozobaz/79692417991.pdfIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/periodic_health_assessment.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/silent_letters_in_english_rules.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/moten.pdfIn PDF document text
    • https://s3.amazonaws.com/kopisigapub/sisiwigub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/6050/1921/files/jerabaxexos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/5346/4738/files/tozovurek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4456/8220/files/73174253965.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/7616/9109/files/23645864136.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/2392/6949/files/fda_added_sugar_guidelines.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/3321/5143/files/snes9x_apk_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/2497/2475/files/measurement_and_control_system_book.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_off00006943.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6943 5212 bytes
SHA-256: 336abb1bc4ac1f603ffc485002359f49a24c3b4b1b1e2a1cbf7be0c9de2223b3
font_01_sfnt_off00007af7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AF7 11636 bytes
SHA-256: 03d9ba928d18b6b80834b103e7833de6f88cbc62d7c0496265f63645597e5fa5
font_02_sfnt_off0000a0b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA0B7 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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