Malicious PDF — malware analysis report

Static analysis result for SHA-256 14d6bc5454c214d7…

MALICIOUS

PDF

80.3 KB Created: 2021-03-08 03:20:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 366ba5a92e4de3bda32d8ce7e28ff9f8 SHA-1: e46ebe266a4779e99814ea6068a23faba9ad8dea SHA-256: 14d6bc5454c214d7ab64afc9dd78b6514d493b484920f3418706f8f93844ef94
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, characteristic of a link farm or phishing lure, directing users to various domains. The presence of PDF_SEO_LINK_FARM heuristic further supports this, suggesting the PDF is used to generate traffic to other sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://vilenefex.ru/strik?utm_term=is+there+a+mockingjay+part+2
    • http://jegipebor.iblogger.org/wawasawoveget.pdf
    • https://cdn.sqhk.co/viforoge/gjmCgck/gmail_sign_in_account.pdf
    • https://cdn.sqhk.co/vewukiziwemi/jhLhahi/dictatorial_definition_simple.pdf
    • https://cdn.sqhk.co/mopewedote/aiahd0x/xideki.pdf
    • https://nokogijesa.weebly.com/uploads/1/3/1/4/131452879/5347182.pdf
    • http://nizavevorupuj.mywebcommunity.org/how_to_pair_a_blueant_bluetooth.pdf
    • https://cdn.sqhk.co/wenoxavawo/ejeLghh/54020315475.pdf
    • https://pebepatesova.weebly.com/uploads/1/3/4/4/134447190/1903511.pdf
    • http://fefiwizam.sportsontheweb.net/dyson_dc39_vacuum_head_not_spinning.pdf
    • http://vkrowl.com/wait_but_why_neuralinkfsrwk.pdf
    • http://0fruits.space/singtel_authorization_letter_templatepdsqx.pdf
    • http://tibagisuminove.sportsontheweb.net/the_little_book_of_common_sense_investing_review.pdf
    • http://supariwepexafat.mywebcommunity.org/jolefegafawoto.pdf
    • https://viwitilabepimep.weebly.com/uploads/1/3/2/6/132695477/3e04de88ce0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://ninukak.epizy.com/gawovuzemofo.pdf
    • http://jonukufazok.rf.gd/vufojukuwukiwirip.pdf
    • http://vugozagiduzek.rf.gd/valentine_day_chocolate_images_free.pdf
    • http://norolejogoxep.epizy.com/mepakumelilu.pdf
    • http://namegudobilud.epizy.com/commando_4_game_for_pc_free.pdf
    • http://tifimiferodovi.rf.gd/pakokeromenukaremiwixexi.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f181.bin
e2361af8dd8cbc1a41d416b49923f9c96d1f0ac56551090e95378413fb9b9f62		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF181 5416 bytes
font_01_sfnt_off000103c9.bin
0fb3ec62bc2b37acbfd96bb688abd920ad84a539d2050932d9fe5f58934b2491		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103C9 9864 bytes
font_02_sfnt_off00012594.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12594 4324 bytes

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