Malicious PDF — malware analysis report

Static analysis result for SHA-256 7477bddb7f67325c…

MALICIOUS

PDF

71.4 KB Created: 2021-04-03 19:16:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ffbf3109fffbd211b7c3cd125b171165 SHA-1: 8ec77a06f06ba732f2263ff17e75aa0a47ab6ac2 SHA-256: 7477bddb7f67325cad64b0e3cdd1180e87a1dcc049360813c06edba43ef49460
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. The presence of numerous external links, particularly the one to 'soxebez.ru', suggests a phishing or malware distribution scheme. Although no scripts were directly extracted, the PDF structure and embedded links point towards an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://soxebez.ru/wix?keyword=kate+landry+purse+rn+58909
    • https://cdn-cms.f-static.net/uploads/4476150/normal_602717137f598.pdf
    • https://cdn-cms.f-static.net/uploads/4451231/normal_5fd298aecf81c.pdf
    • https://cdn-cms.f-static.net/uploads/4449775/normal_60429700b514d.pdf
    • https://static.s123-cdn-static.com/uploads/4392451/normal_5febb75ddd2cf.pdf
    • https://static.s123-cdn-static.com/uploads/4497093/normal_5fd03e81ab4bd.pdf
    • https://cdn-cms.f-static.net/uploads/4393772/normal_60579e44ce71f.pdf
    • https://cdn-cms.f-static.net/uploads/4416504/normal_605ef0b733113.pdf
    • https://cdn-cms.f-static.net/uploads/4475715/normal_60687372317b7.pdf
    • https://cdn-cms.f-static.net/uploads/4481409/normal_6040108968bc1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://b9a4c3d6-4ccf-4d04-9b0f-c2e9c357e15d.filesusr.com/ugd/e5cbe5_50f481ffbf234b97b6101cb46fc110aa.pdf?index=true
    • https://s3.amazonaws.com/mogedozara/vujaxevodozigoxagozilowag.pdf
    • https://s3.amazonaws.com/tevigotu/smith_and_wesson_915_9mm_review.pdf
    • https://2f8a6ab9-e864-4757-b083-6627a13f4c48.filesusr.com/ugd/405339_c265f5b03fcf4720aca2f64db11fe291.pdf?index=true
    • https://98350ace-7ac4-4f38-a9d9-579fdad8050b.filesusr.com/ugd/9b2d9b_96e2f45ba054499aa88fd733a53fc9c7.pdf?index=true
    • https://s3.amazonaws.com/pezofut/15685061763.pdf
    • https://s3.amazonaws.com/sajatesawodiji/brother_project_runway_sewing_machine_instruction_manual.pdf
    • https://aa4a64a1-c69a-4176-9ab9-82648dcabbba.filesusr.com/ugd/70701b_5aa5940a9d79478584f76c6b568ad381.pdf?index=true
    • https://s3.amazonaws.com/tupofelasujewas/cisco_anyconnect_linux.pdf
    • https://s3.amazonaws.com/tunenijexe/california_food_handlers_license_answers.pdf
    • https://s3.amazonaws.com/zowejunef/nikedagexufod.pdf
    • https://s3.amazonaws.com/gezizefefififa/lulajidur.pdf
    • https://s3.amazonaws.com/telasebisu/phonetic_oxford_dictionary_free.pdf
    • https://s3.amazonaws.com/getizar/94861989370.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d825.bin
8198c8e46d9379a99435d86a638094adc95b7c50b26a523cae52c8505f17948f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD825 5640 bytes
font_01_sfnt_off0000eb70.bin
98432696b0489b90594f3ba96790f980f0bddba3702134f85bbb43dfa8f0f775		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB70 10704 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.