Malicious PDF — malware analysis report

Static analysis result for SHA-256 3406d0fea505f710…

MALICIOUS

PDF

90.4 KB Created: 2020-12-17 21:21:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: a9c6da2d9426cc462019cca192af623e SHA-1: e855afb76e8438cf3441c00b3a5a0b10875b3b02 SHA-256: 3406d0fea505f7104f6e3acb77b846d6d2c0d2dde6c41cccbb7849e4684a593a
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for link farms or phishing campaigns. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of embedded URLs and the PDF structure suggest it's designed to redirect users to potentially malicious websites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • 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://trafffe.ru/123?utm_term=jasper+wireless+email+to+text+not+working PDF link annotation
    • https://moxitasa.weebly.com/uploads/1/3/1/4/131454719/d9830ee7f4432.pdfIn PDF document text
    • https://finivoxub.weebly.com/uploads/1/3/4/3/134387593/zijibiwuxo_namorafuruvo.pdfIn PDF document text
    • https://zolekifez.weebly.com/uploads/1/3/4/8/134850144/52e91a2d2b.pdfIn PDF document text
    • https://zijavenokin.weebly.com/uploads/1/3/4/3/134315340/9340633.pdfIn PDF document text
    • https://jiwefirufij.weebly.com/uploads/1/3/4/3/134370204/fovapu_nidawajese_giworojulewu.pdfIn PDF document text
    • https://duveniwapawas.weebly.com/uploads/1/3/4/2/134265961/kejesow.pdfIn PDF document text
    • https://simidolipuxemit.weebly.com/uploads/1/3/4/4/134486986/danupafab.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/jeponowon/bodowizolojunadek.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0ba3b0a2757459be1f9cb/t/5fc0f0743c6ccf69f37fac75/1606479989029/novonodisozuxewisot.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1b348e5c7695ca9a14b85/t/5fce93e680294c2e6bc9e6ee/1607373799162/santa_adventure_world_map.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc112aed26ff1194f74a888/t/5fc20af6a97599144e3e49d9/1606552311813/93162224410.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc280b3405d5340f333d31f/t/5fc38df3cb3e0f5771bdf9df/1606651383710/8345767464.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc297e6df132613bbc87a99/t/5fc88cb04b97230d05101abc/1606978743891/2107.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc7ba19161f8068bed05d18/t/5fc818436652ad59ec1a81d8/1606948931650/77882333515.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00012ce4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x12CE4 26436 bytes
SHA-256: 6f86fe2611e414d2e310077eac46613802402bd0a2289923644e78cb01de6ba8
font_00_sfnt_off0000f2fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2FE 5352 bytes
SHA-256: a8287f90ff282cdb58b719a26c4ded5d055654bc99db9a5c95d69fca47149500
font_01_sfnt_off00010535.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10535 12052 bytes
SHA-256: 756d6b99211219986aaf558b9c7f13fa7826ae929dc663c1df4af7ab34cbfaaf

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