Malicious PDF — malware analysis report

Static analysis result for SHA-256 13cab58366c7f6a8…

MALICIOUS

PDF

77.2 KB Created: 2020-12-31 01:20:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: f430c9f1a525a06887b9bfcdfebfe486 SHA-1: 17073ce2a91ba96a84f804df835ae657f6f04abf SHA-256: 13cab58366c7f6a883fe5e48a26f49d1f0c278cbd6afed25021c47d4b705d6b1
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains a lure impersonating an Outlook.com sign-up screen, which is a common tactic for phishing and tech-support scams. It also embeds a URL pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely involving the exploitation of a PDF vulnerability to execute a payload.

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
  • 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.
  • 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.
  • 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://cctraff.ru/123?utm_term=outlook.com+sign+up+screen In PDF document text
    • https://cdn-cms.f-static.net/uploads/4376621/normal_5f8f60ae23eb2.pdfIn PDF document text
    • https://cdn.sqhk.co/biwezabob/SfCdHIX/hitmasters_portal_mode.pdfIn PDF document text
    • https://jijigine.weebly.com/uploads/1/3/4/6/134672257/rekirolazike-zubixig.pdfIn PDF document text
    • https://wepebagelokej.weebly.com/uploads/1/3/4/5/134583559/77d84ef4ec57e.pdfIn PDF document text
    • https://cdn.sqhk.co/bonidanem/kjj2Fji/world_war_rising_mod_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/marixefe/hfpjhh4/duets_movie_karaoke_songs.pdfIn PDF document text
    • https://wolofineso.weebly.com/uploads/1/3/4/5/134598063/9748134.pdfIn PDF document text
    • https://fobibopokigafo.weebly.com/uploads/1/3/4/7/134702456/858344f4d468cd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/727666d5-e166-489b-8f10-80d5049d587c/diwutam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5273935f-9f22-46b1-89af-1f0f8051031a/kiboxofabujoxixikuvozobi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab1967b9-6713-4471-9b53-a5f8f3575ca5/44654489110.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_off0000f0a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A2 5164 bytes
SHA-256: e83b89a1c6aa4be34ac634bb693071db946fc5aead663e7a8962b0ef992e21b6
font_01_sfnt_off0001022a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1022A 11164 bytes
SHA-256: 09912750d633bcef78f95b11cd74efbbe7b727b2d580530d31c223b49126dc63

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