Malicious PDF — malware analysis report

Static analysis result for SHA-256 14aad2499cb120b8…

MALICIOUS

PDF

68.0 KB Created: 2020-12-22 20:28:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 6bdd6774658b86cefba86783e05ea9d4 SHA-1: d04c72806a2132a992d33a82a224c04401d38331 SHA-256: 14aad2499cb120b851a62c3519c78cb45f2e00e4e4a412b4bd0db9724fadfd69
184 Risk Score

Malware Insights

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

The PDF document was flagged by multiple heuristics as malicious, including a critical alert for linking to known malicious redirector infrastructure. The document body is heavily obfuscated, but the presence of numerous embedded URLs, many pointing to disposable hosting or unknown reputation sites, strongly suggests a phishing or redirection campaign. No scripts were extracted, but the overall structure and URL findings indicate a likely attempt to lure users to malicious 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
  • 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 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://gettraff.ru/strik?utm_term=bulk+battery+operated+window+candles In PDF document text
    • https://sokuvotaboraj.weebly.com/uploads/1/3/0/7/130776263/jikuperomofa_funixajerufaga_fafelo.pdfIn PDF document text
    • https://pukotegifo.weebly.com/uploads/1/3/0/8/130874060/b6dd1a1341fb9.pdfIn PDF document text
    • https://tugigoboz.weebly.com/uploads/1/3/4/4/134499705/c29500e1.pdfIn PDF document text
    • https://dajidavibaral.weebly.com/uploads/1/3/4/6/134606929/f3e55b66349.pdfIn PDF document text
    • https://rimofemosi.weebly.com/uploads/1/3/4/3/134351632/xiloloduze.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/941273d4-7705-4960-aaef-1967990c1af3/gifted_movie_download_300mb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9fe3e19-4f92-4b59-9531-00423ddbe6c4/fivaveritexepusova.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34b9e439-da38-4911-8f9b-d387ffbf78b9/judipiguvubedewavi.pdfIn PDF document text
    • https://s3.amazonaws.com/remeranexe/pidawigijoterobikidobiva.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2a834abaecd33182d7d6c/t/5fc3e1d12dd96f5918656631/1606672857177/65989353443.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db8b38a0-36a8-42d1-80ae-6360cff0b316/piponajuxaleguzasif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb8f7e79-b103-4e35-80b6-61cb04ae4007/quilt_board_daily_digest.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6eaddb4-dbee-471a-a15d-884e6dc3a544/91928525496.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_off0000cab7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAB7 5512 bytes
SHA-256: 08e794f346927e8e92042b8d00a6772a22c25459bff91ba64b283a0ed50e88c5
font_01_sfnt_off0000dd9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD9B 11100 bytes
SHA-256: c7f3979243d1176569fc534e99fbf37f51b357a2f6bacb5b8d18e15890722d1b

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