Malicious PDF — malware analysis report

Static analysis result for SHA-256 63aefe16442322c8…

MALICIOUS

PDF

80.6 KB Created: 2021-03-01 08:45:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: dc3f408cf063e113c6d7bff820060e56 SHA-1: adb6cbc717cfe4dbfba5eb06c2624571dabe6e76 SHA-256: 63aefe16442322c8becb68534e4d7e6927ac4805d0a779e122a45af2db3a9a97
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. It contains numerous embedded URLs, with a primary malicious URL pointing to 'mezovuduw.ru'. The document body, though heavily obfuscated, appears to contain keywords related to software and operating systems, likely intended to trick users into clicking the malicious link. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://mezovuduw.ru/strik?utm_term=scansnap+s1300i+macos+catalina PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4388815/normal_5fd790c9e5791.pdfIn PDF document text
    • https://lomofoxagut.weebly.com/uploads/1/3/4/5/134524577/besawavuf-gobupiwawezoge-xivaguwufak-womel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403428/normal_600b2e3cf37d2.pdfIn PDF document text
    • https://bawapumur.weebly.com/uploads/1/3/4/4/134466187/vuradawiw.pdfIn PDF document text
    • https://minadefimufev.weebly.com/uploads/1/3/4/6/134635785/sibexomazedup_kuzibaneba_munadatinabi_nugikeru.pdfIn PDF document text
    • https://cdn.sqhk.co/tazuxalana/ihbB5jh/tiny_army_game_online_play.pdfIn PDF document text
    • https://cdn.sqhk.co/gefimiwotux/Liajidz/78573373534.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369914/normal_5ff7d4593b5e6.pdfIn PDF document text
    • https://cdn.sqhk.co/togokitaz/8rKwThi/83373758127.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469630/normal_602e8565617ae.pdfIn PDF document text
    • https://nojinogexosop.weebly.com/uploads/1/3/4/6/134695112/jebajugikomeg.pdfIn PDF document text
    • https://rowagikej.weebly.com/uploads/1/3/4/6/134678960/c14b9bf.pdfIn PDF document text
    • https://cdn.sqhk.co/zotipimesaza/dTha3jd/fowol.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
    • http://nerezusilanake.atwebpages.com/pivirowijemevunoteremise.pdfIn PDF document text
    • https://s3.amazonaws.com/tazopaju/how_to_ask_for_a_recommendation_letter_for_law_school.pdfIn PDF document text
    • https://s3.amazonaws.com/rodiligarexo/android_6._0_1_marshmallow_zellikleri.pdfIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/chupke_chupke_chori_chori_tamil_song.pdfIn PDF document text
    • http://wufikemofumop.atwebpages.com/60700351394.pdfIn PDF document text
    • http://kubomefewofumim.atwebpages.com/book_of_noah_online.pdfIn PDF document text
    • https://s3.amazonaws.com/buganabowumujef/66268242105.pdfIn PDF document text
    • http://wotidupodugi.myartsonline.com/97808378736.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_off0000f090.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF090 5116 bytes
SHA-256: d6b76c8c19b4846039af1701def8118e78fa828b5f7d62cd2756542cd17296d9
font_01_sfnt_off000101c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101C7 10792 bytes
SHA-256: 495cd05093460407ccce6129457ca9b418329edb991dd5335c4fc06d47432f43
font_02_sfnt_off00012697.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12697 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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