Malicious PDF — malware analysis report

Static analysis result for SHA-256 29fe208cd33d03a0…

MALICIOUS

PDF

68.8 KB Created: 2021-02-26 11:40:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 59b6d170cfe9ac8ff9c7d872f9bef2dc SHA-1: a7bee22af527216ab89a89bb3245125d226491be SHA-256: 29fe208cd33d03a0c52d6d4035294f42eae2d246ce16f24ace84d9dd2f35a4d1
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous embedded URLs, many pointing to disposable domains or link farms, suggesting a phishing or malware distribution attempt. The presence of external URIs and the 'link farm' heuristic indicate an effort to redirect the user to potentially harmful content.

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 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.
  • 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://jumiwimov.ru/strik?utm_term=how+do+you+program+a+remote+to+a+genie+garage+door+opener PDF link annotation
    • https://cdn.sqhk.co/mopewedote/ehcGgu1/best_yellow_cupcake_recipe_from_scratch.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378151/normal_60183d84235a2.pdfIn PDF document text
    • http://begetus11ppz.xyz/kataxepopefakulobeleblwe3b.pdfIn PDF document text
    • https://cdn.sqhk.co/tepobugu/gwjfhj3/mr_bowling_ball_arborvitae_height.pdfIn PDF document text
    • http://jafixane.iblogger.org/ardamax_keylogger_for_android.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486034/normal_5fe233029f98f.pdfIn PDF document text
    • https://cdn.sqhk.co/fewukise/ji0jcjc/19493294112.pdfIn PDF document text
    • https://cdn.sqhk.co/totafeta/ji2icja/82706648610.pdfIn PDF document text
    • http://myfoxing.online/graphical_resume_template_free8b809.pdfIn PDF document text
    • https://cdn.sqhk.co/pigajifaw/9gehbI7/kapibupegowumeze.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://julizut.rf.gd/51134358977.pdfIn PDF document text
    • http://zadaxuro.rf.gd/99308196908.pdfIn PDF document text
    • https://s3.amazonaws.com/mozedijiz/ac_market_apk_cracked_free.pdfIn PDF document text
    • http://muwusub.rf.gd/brainstorming_teaching_strategy.pdfIn PDF document text
    • http://kunipotow.epizy.com/82977220938.pdfIn PDF document text
    • https://s3.amazonaws.com/solonebosop/lanizuk.pdfIn PDF document text
    • http://dasabenanej.epizy.com/lds_hymn_medley_piano_sheet_music.pdfIn PDF document text
    • http://pepudujer.epizy.com/pesazifexivesin.pdfIn PDF document text
    • http://vezuzatutuxi.epizy.com/candy_camera_old_version.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_off0000d25f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD25F 5224 bytes
SHA-256: aa222226f4754b970de1686e8928be8668521e50122e82b315857ed3d890b0d1
font_01_sfnt_off0000e426.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE426 9792 bytes
SHA-256: 61ee08696bb1df4ba093e8b23b05961729f5f078772daa8759d1e8194483039e

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