Malicious PDF — malware analysis report

Static analysis result for SHA-256 1aee51fa10b90123…

MALICIOUS

PDF

69.9 KB Created: 2021-02-22 12:52:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 1a0d376f2fc7887de0bcb40e2817ca43 SHA-1: 2b3530a857a8d500fb409210b4be71bcbb97e61f SHA-256: 1aee51fa10b90123ba02995001d13a1cf79602199278a89e674d832553a56342
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a link farm. One prominent URL, 'https://jacksth.ru/strik?utm_term=how+to+connect+steelseries+arctis+1+headset+to+xbox+one', suggests a lure to a potentially malicious site. ClamAV detection as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0' further indicates malicious intent, likely related to phishing or malware delivery.

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://jacksth.ru/strik?utm_term=how+to+connect+steelseries+arctis+1+headset+to+xbox+one PDF link annotation
    • https://puroporutenes.weebly.com/uploads/1/3/1/6/131606954/3027339.pdfIn PDF document text
    • https://rabifitirigi.weebly.com/uploads/1/3/0/7/130739094/6248391.pdfIn PDF document text
    • https://roxodebovak.weebly.com/uploads/1/3/1/4/131454305/b19a03.pdfIn PDF document text
    • https://kevonixoxudunu.weebly.com/uploads/1/3/0/7/130775897/2209eb0fb.pdfIn PDF document text
    • https://gororumemi.weebly.com/uploads/1/3/4/5/134517819/zotofedube.pdfIn PDF document text
    • https://pujibotawajifuw.weebly.com/uploads/1/3/1/3/131379639/4099795.pdfIn PDF document text
    • http://hydraruzxpnew4af.exchange/50804741338q2faw.pdfIn PDF document text
    • https://bamebifubakuta.weebly.com/uploads/1/3/1/4/131408159/4036166.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/medaliwifufugel/oh_baby_girl_tamil_song_video.pdfIn PDF document text
    • https://s3.amazonaws.com/mokamoba/68951614977.pdfIn PDF document text
    • https://s3.amazonaws.com/supefujoxopubu/34569128050.pdfIn PDF document text
    • http://felubumasosazi.epizy.com/sarkar_hd_movie_free_tamilrockers.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/jixawuz.pdfIn PDF document text
    • https://s3.amazonaws.com/kizugokofo/14679273402.pdfIn PDF document text
    • https://s3.amazonaws.com/vavapekadoliti/cardi_b_bruno_mars_grammy_performance.pdfIn PDF document text
    • https://s3.amazonaws.com/suzujewa/bichoo_movie_ming.pdfIn PDF document text
    • https://s3.amazonaws.com/wobuzisibal/roxomeda.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d502.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD502 5340 bytes
SHA-256: 557c2e4a2a5245defaf9714287ffe859ad974544679fc2a17e1830ff0b2436f1
font_01_sfnt_off0000e737.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE737 10228 bytes
SHA-256: 97b3516d7c125e4ed46f36e4580b004196414a3d3cafe9691d77428161560617

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