Malicious PDF — malware analysis report

Static analysis result for SHA-256 e41c8bded6f03390…

MALICIOUS

PDF

61.7 KB Created: 2021-01-12 15:17:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 90d1c5007b32a5bc0afc43390a720784 SHA-1: 59da52a9d7948d7945302b5496bd932863edb3b9 SHA-256: e41c8bded6f03390ea8f56450e9125de278850b5a27648107bff79b4312619b1
244 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' heuristics. The embedded URLs, such as 'https://traffmen.ru/aws?utm_term=aakasamantha+movie+songs++from+naa+songs', are likely used to distribute further malicious content or phish for credentials. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 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.
  • 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://traffmen.ru/aws?utm_term=aakasamantha+movie+songs++from+naa+songs In PDF document text
    • https://site-1191111.mozfiles.com/files/1191111/christmas_duets_movie_cast.pdfIn PDF document text
    • https://site-1168233.mozfiles.com/files/1168233/99890579933.pdfIn PDF document text
    • https://site-1171806.mozfiles.com/files/1171806/track_visa_status_italy.pdfIn PDF document text
    • https://site-1084368.mozfiles.com/files/1084368/petamuzetiduvigukubamigi.pdfIn PDF document text
    • https://cdn.sqhk.co/fuwufupi/IibW0bS/jimedesepawopotuwulu.pdfIn PDF document text
    • https://xutifapob.weebly.com/uploads/1/3/2/7/132712150/waxofiguwiwuvup.pdfIn PDF document text
    • https://site-1172602.mozfiles.com/files/1172602/32100454113.pdfIn PDF document text
    • https://cdn.sqhk.co/womibakok/GhfAgdp/recargas_claro_desde_usa_a_guatemala.pdfIn PDF document text
    • https://cdn.sqhk.co/disidudi/ihzYijW/sutubejezuxe.pdfIn PDF document text
    • https://naxizugopigonav.weebly.com/uploads/1/3/1/4/131408516/bedilazase.pdfIn PDF document text
    • https://cdn.sqhk.co/datimemovuko/3Dihmoh/pay_express_online_philippines.pdfIn PDF document text
    • https://site-1168144.mozfiles.com/files/1168144/puguxabukofawamib.pdfIn PDF document text
    • https://ranefegol.weebly.com/uploads/1/3/4/4/134498511/9496481.pdfIn PDF document text
    • https://gideturifit.weebly.com/uploads/1/3/4/8/134887905/jobuvu.pdfIn PDF document text
    • https://site-1176800.mozfiles.com/files/1176800/play_games_free_fire_online.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b680.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB680 5260 bytes
SHA-256: 45bec35b5f67714bbc3fa2041fe521247c0e7065a08bbb85eae3db89f033cf7f
font_01_sfnt_off0000c84b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC84B 9976 bytes
SHA-256: dbe2c217691403573e9183d39ddb3e0b023b97e49228043b111b20ef3f85c8e6

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