Malicious PDF — malware analysis report

Static analysis result for SHA-256 968d661355eafaed…

MALICIOUS

PDF

90.2 KB Created: 2021-02-26 05:45:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 796bdc074c69161106f111e8b880db35 SHA-1: 94425daa3f9703f6d9176940aff18bd42d91be59 SHA-256: 968d661355eafaed5a3639911f51769336876d8d64ab4659cf9f8741eabb66e4
244 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and a machine learning classifier, indicating it is likely a phishing or redirector document. It contains a large number of embedded links, many pointing to disposable domains and redirector infrastructure, designed to lead users to malicious sites. The document body, though heavily obfuscated, appears to be a lure related to '48 laws of power summary youtube'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://yafferge.ru/strik?utm_term=48+laws+of+power+summary+youtube In PDF document text
    • https://cdn.sqhk.co/mekerijiwuv/ddvjgia/27561521889.pdfIn PDF document text
    • http://gifinibufenatar.medianewsonline.com/massey_ferguson_35_torque_specs.pdfIn PDF document text
    • https://cdn.sqhk.co/gilubibawi/jghiG0R/jubakexobarix.pdfIn PDF document text
    • https://xajaxosu.weebly.com/uploads/1/3/5/3/135304217/jital.pdfIn PDF document text
    • http://muxusapefon.iblogger.org/restless_development_uganda_application_form.pdfIn PDF document text
    • http://xoroketogejuxe.mywebcommunity.org/the_five_principles_of_total_quality_management.pdfIn PDF document text
    • https://cdn.sqhk.co/luzeginu/czVexhg/hand_drill_angle_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/mepapogivoma/jiZrgeZ/vatibo.pdfIn PDF document text
    • https://xifufakeva.weebly.com/uploads/1/3/0/7/130775652/6325592.pdfIn PDF document text
    • http://suzamajotibe.mywebcommunity.org/what_happened_to_pablos_family.pdfIn PDF document text
    • https://cdn.sqhk.co/moviferu/gigfThb/screen_recorder_with_audio_and_facecam_for_laptop.pdfIn PDF document text
    • https://puvomowaja.weebly.com/uploads/1/3/4/3/134318832/7826191.pdfIn PDF document text
    • https://dalupapixoriwu.weebly.com/uploads/1/3/1/4/131438121/1689904.pdfIn PDF document text
    • https://tifimiwarefimi.weebly.com/uploads/1/3/4/8/134895051/bukijebepevapu-wepukuseda.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://boziwomul.epizy.com/fovimow.pdfIn PDF document text
    • http://zotubune.myartsonline.com/the_exceptional_child_8th_edition_ebook.pdfIn PDF document text
    • http://voputujewijozej.rf.gd/gubagesiwumotukurejezinox.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_off000125e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125E0 5568 bytes
SHA-256: a99ad4727db0e918c3eba8d43488b29cf5a754b752adc81e84fc102f50ea607c
font_01_sfnt_off000138d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138D4 10192 bytes
SHA-256: f04af1b6e1532a625b64309ddbc84d8a27350f62c17aea30d5c4a3d568689072

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