Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f0c6a2e1f3a3af9…

MALICIOUS

PDF

68.4 KB Created: 2020-12-25 02:55:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 65b6d00958d65bf013d455668f5b802f SHA-1: 4b54d30035b1707c3bbc28fbdb1388373bdf28f6 SHA-256: 0f0c6a2e1f3a3af99a531be97f76be256ba1b0db00c2d7842dda0ce70847d273
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links to external PDF files, indicating a link farm or redirection strategy. One critical heuristic identified a link to known malicious redirector infrastructure, suggesting a phishing or malicious content delivery attempt. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious intent, likely to direct users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/strik?utm_term=no+telefon+u+mobile+centre+kuantan
    • https://subefivu.weebly.com/uploads/1/3/4/6/134688636/sizirepipij.pdf
    • https://cdn.sqhk.co/zikegasenar/bhbZihs/clumsy_cat_syndrome.pdf
    • https://pidadilux.weebly.com/uploads/1/3/4/6/134666204/jawemepuwiwifisuluf.pdf
    • https://vuxofuta.weebly.com/uploads/1/3/4/2/134235669/terixifo.pdf
    • https://lemitixodage.weebly.com/uploads/1/3/4/8/134868200/4200328.pdf
    • https://vonufire.weebly.com/uploads/1/3/4/5/134596457/6907842.pdf
    • https://dusuwepi.weebly.com/uploads/1/3/4/5/134589125/sipudopidewu.pdf
    • https://xagufiwukana.weebly.com/uploads/1/3/4/6/134694649/vogamuza.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/f7e79106-057f-4b93-b1f9-262394dede7e/jekenoka.pdf
    • https://s3.amazonaws.com/likadojivivofu/298451686.pdf
    • https://s3.amazonaws.com/jamokaroxoj/18105321420.pdf
    • https://s3.amazonaws.com/vokeri/suvawivativekenimenes.pdf
    • https://s3.amazonaws.com/julexekubaj/livenol.pdf
    • https://s3.amazonaws.com/tibanepoxilibud/asus_zenfone_5z_pie_update.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_off0000ce21.bin
48faedda05b3accfc309f17a9ce46e71bbe326dbc7ba1e95368e4e40d423772d
pdf-font-stream PDF embedded font (sfnt) at offset 0xCE21 5024 bytes
font_01_sfnt_off0000df2b.bin
ed09773173a8eb5d2d620539f858291fabe1f0a2eb031068629ac239041bb47a
pdf-font-stream PDF embedded font (sfnt) at offset 0xDF2B 10960 bytes