Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa8909c548725024…

MALICIOUS

PDF

64.3 KB Created: 2021-02-23 07:08:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 5c81e78e6f532cbb37f5e2e97bf5cf6c SHA-1: df58a5a68c3946682b8262a86cd815151d15da54 SHA-256: fa8909c548725024cfdc0985849121b745e9fe9aaf60c35a5baf44a4293a3d12
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ClamAV and an ML classifier. It contains an embedded URL that leads to a domain associated with phishing or malware distribution. The document body, though heavily obfuscated, appears to be a lure related to a common search query, likely intended to trick the user into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • 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://bologen.ru/wb?keyword=how%20many%20carbs%20in%20sonic%20small%20onion%20rings PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4487184/normal_602ddbc568903.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492586/normal_5fdb14369027f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460709/normal_5fe099bb23d16.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4503787/normal_5ff3e8bad798c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476282/normal_5fcf04874e874.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417813/normal_600c012d7e84d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501980/normal_5ffad4c7a1e79.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382962/normal_6016c5da2cdbf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445564/normal_5ff2077f5933e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388608/normal_5fe8028118e31.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403946/normal_60258b890f74c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486748/normal_6021ac6d2157f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371004/normal_5fcb61758e709.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455883/normal_600540fe525bc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/90933305544.pdfIn PDF document text
    • https://s3.amazonaws.com/satuja/58739534906.pdfIn PDF document text
    • https://s3.amazonaws.com/bipovoromoj/blackberry_classic_android.pdfIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/61152427395.pdfIn PDF document text
    • https://s3.amazonaws.com/suxiweke/skype_interview_questions_and_answers_for_freshers.pdfIn PDF document text
    • https://s3.amazonaws.com/wexukufedepim/ludosivajiminekuxakore.pdfIn PDF document text
    • https://s3.amazonaws.com/bulolimepol/ldc_2018_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/womirofop/best_egyptian_percale_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/tuloxurogepajudasem.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_off0000bf2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF2B 5416 bytes
SHA-256: f1c0f81d939c20fb7610cdc6f5949c70048457cd5be103b2a32d87f4263ae826
font_01_sfnt_off0000d191.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD191 9972 bytes
SHA-256: b6e2dcad8fc3d4eecc05d6a22fd508bd37bf03de9d089701e97c7d7b888cf55d

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