Malicious PDF — malware analysis report

Static analysis result for SHA-256 1373aeaec3a9c6bf…

MALICIOUS

PDF

111.0 KB Created: 2021-04-28 02:25:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 8bcc1c307fecfa6dc1b7192e56f0c084 SHA-1: 25e5b5f3eeece9349415218a6072628ba77419b1 SHA-256: 1373aeaec3a9c6bfb7d0b83642dc466c315e2973da268e25ca913b82a2a9fde0
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of numerous external links, particularly the 'PDF_SEO_LINK_FARM' finding, suggests a tactic to drive traffic to potentially malicious or phishing sites. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing or link-farming campaign.

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://xezojetit.ru/strik?utm_term=what+does+auld+lang+syne+translate+to PDF link annotation
    • https://kaxogirigajel.weebly.com/uploads/1/3/4/6/134611066/vupinimutoz.pdfIn PDF document text
    • https://cdn.sqhk.co/kolusugego/ejhMie9/super_slime_simulator_diy_super_slime_maker_game.pdfIn PDF document text
    • https://ruzisatof.weebly.com/uploads/1/3/4/7/134734885/55203.pdfIn PDF document text
    • https://cdn.sqhk.co/jujejorule/bn3fhaK/64511748906.pdfIn PDF document text
    • http://jolujunutido.iblogger.org/tupegajolufixarixozepade.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461216/normal_60559f099b2f8.pdfIn PDF document text
    • https://gisijenoxumo.weebly.com/uploads/1/3/1/4/131437849/120203.pdfIn PDF document text
    • https://boxesagako.weebly.com/uploads/1/3/4/5/134589877/546e0d8d1dc5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460686/normal_6063038b1166e.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/xalasawu/pavojitufowep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09768052-b3b5-443e-b43f-5d8b1d8a8ac5/how_to_whitewash_over_dark_paint.pdfIn PDF document text
    • https://s3.amazonaws.com/tugabijenovili/bemum.pdfIn PDF document text
    • https://s3.amazonaws.com/mupukesunobaga/happiness_movie_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d43f9c4-59f6-4671-900f-16d5a5390d4b/motherboard_model_asus_p8z77-v_lx2.pdfIn PDF document text
    • http://kopuperoki.epizy.com/jexasizefemi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d8fccdb-b3b4-43e1-bd83-7b0abdd94ebf/how_to_calculate_cost_of_production_per_unit.pdfIn PDF document text
    • https://s3.amazonaws.com/roxawo/83165858803.pdfIn PDF document text
    • https://s3.amazonaws.com/sitozi/buddha_badrinath_cartoon.pdfIn PDF document text
    • http://vowaderisosalel.epizy.com/numunupodale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66e705a0-a10d-4c4d-b606-7a7bff3fe39a/is_call_me_by_your_name_book_graphic.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d7594de-fc4b-4e07-b328-26b3b53ccfaf/xuxagara.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_off0000ea96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA96 46400 bytes
SHA-256: c8cfe4863160689ac5e25f191ebd301394715c22dc5dbec1dd6cdb4822098b8b
font_01_sfnt_off0001777e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1777E 5204 bytes
SHA-256: a3debb9d1ebe65689fbe8df9c154bc4ba33bea27d52e79e46ddc324eed8baf6a
font_02_sfnt_off0001893a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1893A 10944 bytes
SHA-256: 58d2764e4c4da116418c4a523140d4f49596be1c7ca09e4af0f8a8150b360d27

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