Malicious PDF — malware analysis report

Static analysis result for SHA-256 34ff06b33b327319…

MALICIOUS

PDF

136.2 KB Created: 2021-03-23 00:44:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f5bd266d9a82de4eb3541099662ffac2 SHA-1: d8449c6d3609a345fa033acc577646d9201a7b46 SHA-256: 34ff06b33b327319ed7c7723c0daaf94b1fbd1e714998eb4e878d4ba75d8c9a4
176 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of a large number of external links, including one to 'dafemum.ru', suggests a link farm or phishing attempt. The 'SE_CALLBACK_LURE' heuristic further indicates a potential callback phishing or tech-support scam. While no scripts were explicitly extracted, the PDF structure and heuristics strongly suggest malicious intent, likely to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://dafemum.ru/award?keyword=situation+awareness+theory+pdf
    • https://vokugekezigak.weebly.com/uploads/1/3/4/5/134592112/e5968da.pdf
    • https://cdn.sqhk.co/puvalonu/WwgehgP/tajovifibimeliforamogipek.pdf
    • https://rabofabi.weebly.com/uploads/1/3/0/8/130813834/tejuziporufomuline.pdf
    • https://buxarurusej.weebly.com/uploads/1/3/1/8/131856129/7cfedd6228c98ce.pdf
    • https://cdn.sqhk.co/zupodejadofe/jji7jfM/free_ringtones_for_my_lg_phone.pdf
    • https://static.s123-cdn-static.com/uploads/4373519/normal_5fe51358ce952.pdf
    • https://bivapere.weebly.com/uploads/1/3/4/6/134689139/nefogoteliwavivol.pdf
    • https://static.s123-cdn-static.com/uploads/4446774/normal_60060fadcc871.pdf
    • https://cdn.sqhk.co/nokotadi/1jagjje/sisobudemesupejirukes.pdf
    • https://damabinon.weebly.com/uploads/1/3/0/7/130738970/fajotaxelen.pdf
    • https://cdn.sqhk.co/jeforije/giCijjd/restaurant_daily_cleaning_checklist_template.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://949217f6-ecfc-4a1b-8806-967b2a145102.filesusr.com/ugd/b08fd2_b46c28a3d9534949a59012379a075521.pdf?index=true
    • http://wijijatalil.epizy.com/fibobalasapaka.pdf
    • http://fokibuzevurir.rf.gd/83781859835.pdf
    • http://jelesopufif.epizy.com/alg_ii_antrag.pdf
    • https://s3.amazonaws.com/fejififimaketo/numerical_expressions_worksheets_5th_grade.pdf
    • https://68420551-d949-41c4-975b-2ae86aa6d062.filesusr.com/ugd/09c3c7_95aea5f7aac94d40a3784b6d8e284f53.pdf?index=true
    • https://s3.amazonaws.com/mizeteb/shutterstock_remove_watermark.pdf
    • https://s3.amazonaws.com/mipeboro/why_is_my_pc_making_a_humming_noise.pdf
    • http://waxukoke.epizy.com/73075336864.pdf
    • http://gatokelemek.rf.gd/acta_de_constitucion_de_proyecto.pdf
    • https://79c9c32e-6572-42fd-9c0e-61d057d48a34.filesusr.com/ugd/33a1c8_340512f26b284d36b9b4d7f05e6989d9.pdf?index=true
    • 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_off0001cc01.bin
ea805ba95b792877e6776e8c739709275f0778cc65b5ca4b96158226cd6f1fc0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1CC01 5276 bytes
font_01_sfnt_off0001ddf9.bin
5f75d1cb1c5967aeaa5833697b3277b8866b35b04b7cce1afffcaf4a1c01753f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1DDF9 11696 bytes
font_02_sfnt_off000204f7.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x204F7 4324 bytes

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