Malicious PDF — malware analysis report

Static analysis result for SHA-256 39cce55e327fde7d…

MALICIOUS

PDF

70.9 KB Created: 2021-01-18 03:13:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: c2a87f064341fc85c886a6c0257271e0 SHA-1: 708a08990ce281544740a5c594fbcfbf63ff44bb SHA-256: 39cce55e327fde7d919a274faf70566b375d99bb31001a334e0e228141c9d6d5
184 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The embedded link is disguised with a 'wilderness survival guide' term, suggesting a lure to entice users to click. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest malicious intent, likely to lead the user to a second-stage payload or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://cctraff.ru/123?utm_term=d%2526d+wilderness+survival+guide+pdf In PDF document text
    • https://cdn.sqhk.co/jezuleku/Ghbgejc/dikesabimenafupenupideg.pdfIn PDF document text
    • https://neriborotarisim.weebly.com/uploads/1/3/4/3/134345051/1152626.pdfIn PDF document text
    • https://zazewefagawi.weebly.com/uploads/1/3/0/7/130776698/tuletarulovozomol.pdfIn PDF document text
    • https://likixadukevagal.weebly.com/uploads/1/3/4/7/134700169/cc8230a3bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376602/normal_5f8e35b96946d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365580/normal_5f9c2f426cdd4.pdfIn PDF document text
    • https://cdn.sqhk.co/salavogi/WhchiaN/25856068509.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501654/normal_5fc88d7a589bd.pdfIn PDF document text
    • https://cdn.sqhk.co/fusexabuvej/fge4Lhf/defender_130_pickup_dimensions.pdfIn PDF document text
    • https://cdn.sqhk.co/dizoketa/gRhqiaE/proximo_pase_elite_de_noviembre_2020.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452835/normal_5ffde52ad8c1a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367268/normal_5fd235f036e3f.pdfIn PDF document text
    • https://fepobiwebefu.weebly.com/uploads/1/3/4/5/134592484/vububusov_kowalezufunu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493227/normal_5feba1255d17f.pdfIn PDF document text
    • https://mejotowud.weebly.com/uploads/1/3/0/9/130969644/2540946.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/buxoparadazegu/before_after_magazine_free.pdfIn PDF document text
    • http://kidojudal.epizy.com/rakulagiwedowevajefe.pdfIn PDF document text
    • http://wobemiko.epizy.com/149677307.pdfIn PDF document text
    • http://jatuxijor.epizy.com/63828677260.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/3b-_8_spanish_crossword_answers.pdfIn PDF document text
    • http://tefuguwo.epizy.com/kejodanogaraxize.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_off0000dc38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC38 4156 bytes
SHA-256: bae8c65fbb2985f8f9e3f3f2bcf16a0f9e8e1e4a7d5ebf1135d71e3fbc9ddb2e
font_01_sfnt_off0000ea66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA66 10572 bytes
SHA-256: 94cb189c374edf26fad7d4327a8d24f2cc649cc326a3dd56b0ce17d710c9a7f7

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