Malicious PDF — malware analysis report

Static analysis result for SHA-256 4071b15b8eb7e79e…

MALICIOUS

PDF

81.1 KB Created: 2021-04-17 08:08:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 98094435b01081c0f0ccc75214d01dab SHA-1: 1b1788d34379ff85317c4636b5eb4b4a40a27f0e SHA-256: 4071b15b8eb7e79e0793638b00da005618ff6ef6400936eff77977e657edf4ca
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that redirects to a malicious domain, likely as part of a phishing or scam campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to lead the user to a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://zajinet.ru/strik?utm_term=are+washer+and+dryer+combos+good PDF link annotation
    • https://cdn.sqhk.co/zejegure/19nvnrR/stickman_adventure_games_unblocked.pdfIn PDF document text
    • https://cdn.sqhk.co/wufotubi/mzgcqge/97359587656.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369315/normal_5fea457b2c2bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492272/normal_6039cfd1daef5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393488/normal_602aa5120e4bc.pdfIn PDF document text
    • http://frasqen.online/777972849073efg3.pdfIn PDF document text
    • https://cdn.sqhk.co/xakelafu/giV4uja/mp3_player_online_shopping.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416927/normal_601f9baf47eb2.pdfIn PDF document text
    • http://milanbeachs.space/kinusuzokezesivufabegyfbm.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366048/normal_5fffd9ea81627.pdfIn PDF document text
    • https://cdn.sqhk.co/fodexuxefeba/3y6gcDs/57305862238.pdfIn PDF document text
    • http://namelesssouth.xyz/bimco_shipman_2009_word_formatal9k5.pdfIn PDF document text
    • http://drive4mclaneeffingham.com/berlin_criteria_ardsw300x.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b4140449-9b96-4148-8619-c9b3eed7b48c.filesusr.com/ugd/c33cdb_18cb921acb0b4b90a493d03608aa6ab7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lawakux/vovoditoxalazusurit.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/what_are_some_good_metaphors_for_life.pdfIn PDF document text
    • https://43081b45-6e48-4b43-b724-9328fda377ae.filesusr.com/ugd/26481d_1b895687f42f47b9b1adbe33d27eeff0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dosalapasenow/43647905010.pdfIn PDF document text
    • https://c3a7a64c-5591-430b-94d7-c2eadfdf3523.filesusr.com/ugd/966478_9e73e731b8804105b643507e63ffd354.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pazovugal/el_decameron_boccaccio.pdfIn PDF document text
    • https://s3.amazonaws.com/xaliwalufoguni/dixivejekapedinop.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_off0000fee2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEE2 5644 bytes
SHA-256: 9fe83cda564c8fc361cff15d9c0db84065f961f9b6e8f8271b33f8a8863b2a97
font_01_sfnt_off000111f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111F7 10796 bytes
SHA-256: 35099acc941ede85574c0d94cee9023bb96e2ce13747af8e428383c78aa07e26

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