Malicious PDF — malware analysis report

Static analysis result for SHA-256 add444791229d2a7…

MALICIOUS

PDF

71.8 KB Created: 2021-03-14 20:05:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e187585cb6b5c2bf35d4517733d1269e SHA-1: dc471b4d4d0799f1d2b0fb6f6ea0f4c5d6607be6 SHA-256: add444791229d2a775d9c9601ce6f7e225a51dbc0a4075dbc7410bfbd3cb625f
176 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The 'SE_CALLBACK_LURE' heuristic indicates the document is designed to trick users into calling a phone number, a common tactic in callback phishing and tech-support scams. While no scripts were explicitly extracted, the presence of external URIs and the overall detection suggest it may leverage embedded JavaScript or other mechanisms to facilitate the scam.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://zajinet.ru/wix?keyword=2008+fleetwood+pop+up+camper+specs
    • https://cdn.sqhk.co/jutafegobexe/KNge56Q/flix_movie_apk.pdf
    • https://cdn.sqhk.co/vutexexukus/bqDjh5a/kusezizawutegunobemos.pdf
    • https://zokilare.weebly.com/uploads/1/3/4/7/134767859/sovawe.pdf
    • https://cdn.sqhk.co/sugezigo/idpvvQd/wegipatanes.pdf
    • http://gepanukotex.getenjoyment.net/pipokurije.pdf
    • https://cdn.sqhk.co/vabedesi/igivjNm/pejidagivutik.pdf
    • https://cdn.sqhk.co/zolulesar/ijdkjvF/playhouse_with_slide_diy.pdf
    • https://tubozabuzimez.weebly.com/uploads/1/3/4/8/134878922/5006819.pdf
    • https://cdn.sqhk.co/feketukadoz/ibsIWgd/97430702644.pdf
    • https://virutabadipepuv.weebly.com/uploads/1/3/1/3/131398083/1cbe69067.pdf
    • https://pezimanazeto.weebly.com/uploads/1/3/5/3/135309923/lowesawafukik.pdf
    • https://cdn.sqhk.co/jitegoji/ghpgeig/msp_2009_login.pdf
    • https://cdn.sqhk.co/winelolibug/hpRjgsP/mofudimus.pdf
    • https://cdn.sqhk.co/jivaduzar/geqdicQ/dls_2019_real_madrid_apk.pdf
    • https://cdn.sqhk.co/xiwonatewej/xGibWMi/ruwirabusobamezer.pdf
    • https://cdn.sqhk.co/wevavagu/ib6nhiz/71869505713.pdf
    • https://cdn.sqhk.co/nukusigemug/dhkZHgg/xapegejumo.pdf
    • https://cdn.sqhk.co/zigotimuti/iDjcngc/xenos.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/17f95d87-3774-456a-8b1d-653d548616bf/mapubesabanidexowipap.pdf
    • http://diwavubodinaroj.myartsonline.com/best_smart_board_for_classroom_in_india.pdf
    • https://uploads.strikinglycdn.com/files/2762fb08-1bd9-4c0b-9cf4-d8b7ff7bac86/harry_potter_book_5_chapter_38.pdf
    • https://uploads.strikinglycdn.com/files/f279af69-feb6-4377-b74d-2fb8ade03bf3/39041913610.pdf
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6d5.bin
c556af80c1bcccd778e65b819a09c2a745c588fedcc4af02856e60dc79908089		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD6D5 5768 bytes
font_01_sfnt_off0000ea76.bin
59e84e346ff2fd8f08de7c318be24bc15e7ec7a631ff69a1f6281a324ebbfb76		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA76 11592 bytes

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