Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5f14629c8d8c304…

MALICIOUS

PDF

71.2 KB Created: 2021-01-20 04:08:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 6180c6abdcede64bea015396c8ae1d93 SHA-1: 5ce512d2ee26bb7fb30f6e613aed714b679b2be0 SHA-256: e5f14629c8d8c304a90cc71f840ed4166a281f2a95eaac81459f1f8b159308f8
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, many pointing to Weebly subdomains, indicating a link farm or phishing campaign. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffnew.ru/123?utm_term=do-all+outdoors+pigeon+holder PDF link annotation
    • https://milafesubori.weebly.com/uploads/1/3/4/7/134745217/vagokivatetubi.pdfIn PDF document text
    • https://xasigusuvenazuj.weebly.com/uploads/1/3/0/7/130739755/rogimukajidimo.pdfIn PDF document text
    • https://zemapefim.weebly.com/uploads/1/3/4/4/134485651/1524386.pdfIn PDF document text
    • https://juwudusufutibor.weebly.com/uploads/1/3/0/8/130873872/46e8d8396ac90.pdfIn PDF document text
    • https://site-1173505.mozfiles.com/files/1173505/ghost_sounds_for_kids.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
    • https://s3.amazonaws.com/lovetijif/xem_phim_bo_hong_kong_long_tieng.pdfIn PDF document text
    • https://s3.amazonaws.com/vatakefojunib/jamefoteri.pdfIn PDF document text
    • https://s3.amazonaws.com/lusabifef/bole_chudiyan_full_audio_song.pdfIn PDF document text
    • https://s3.amazonaws.com/vixuwogetiv/arushi_talwar_judgment.pdfIn PDF document text
    • http://palojolasorut.rf.gd/bakudakiregaxelovof.pdfIn PDF document text
    • https://s3.amazonaws.com/bejikefowu/dota_auto_chess.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuduwonifa/gekopawodigeva.pdfIn PDF document text
    • https://s3.amazonaws.com/wuwabobujasivor/gta_vice_city_walkthrough_android.pdfIn PDF document text
    • https://s3.amazonaws.com/vikukinumet/a-_one_eurobeat.pdfIn PDF document text
    • http://muzezal.rf.gd/bacterial_meningitis_guidelines_uk.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_off0000ccfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCFB 5136 bytes
SHA-256: 9217f65d2b56887f970e378d804fc5d8bdb978c9fe8e592dfea323b56986e859
font_01_sfnt_off0000de6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE6D 10276 bytes
SHA-256: cf056d142b82d065773fce80026864321fdfaaec3b5798f6bac475891fccb194
font_02_sfnt_off00010197.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10197 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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