Malicious PDF — malware analysis report

Static analysis result for SHA-256 05fd72dc484164d0…

MALICIOUS

PDF

75.4 KB Created: 2021-01-14 04:38:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 310f7c519bf8c18a4ee860c86ee58439 SHA-1: ae610c9e7c896b83f825793f9527ea5d02be0a06 SHA-256: 05fd72dc484164d029e935c91f78c03f0f07a0ebcceb3a2122ccadced976f6fe
214 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, including one pointing to a known malicious redirector. The document's content, though heavily obfuscated, appears to be a lure related to 'Nascar collectibles value guide'. The presence of multiple external PDF links suggests a link farm or redirection strategy to distribute malicious content or conduct phishing. No scripts were extracted, but the heuristic firings strongly indicate malicious redirection and phishing intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • 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://traffking.ru/aws?utm_term=nascar+collectibles+value+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4462056/normal_5fd115f8afc7a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501965/normal_5fdfb1764bbbc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379720/normal_5f944b1fab639.pdfIn PDF document text
    • https://lifotuvuzaraxur.weebly.com/uploads/1/3/0/7/130775275/podegu.pdfIn PDF document text
    • https://cdn.sqhk.co/jigidokasaga/jbhgkib/nail_art_and_spa_elgin_prices.pdfIn PDF document text
    • https://cdn.sqhk.co/manuguwe/lighahc/ririfimevitopuvot.pdfIn PDF document text
    • https://rafomuvufeja.weebly.com/uploads/1/3/1/8/131856077/768408.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481411/normal_5fdc9f4d27fb6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383460/normal_5f8ea00decaee.pdfIn PDF document text
    • https://cdn.sqhk.co/mozopojugode/NgtjhZw/ramimeni.pdfIn PDF document text
    • https://cdn.sqhk.co/pevedapev/fsiaics/linedutafox.pdfIn PDF document text
    • https://cdn.sqhk.co/novujarogoga/eNhfKji/9372743510.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB47 5052 bytes
SHA-256: d0a470fd7e24ab8dbdf240535f01ec6bac22708188e6313685c9a5e0b3c6e36e
font_01_sfnt_off0000ec8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC8C 11000 bytes
SHA-256: 717bdac1a343afee763a9e0b73f941bc8a306bb0b00571c983b76f61a5373bc9
font_02_sfnt_off00011221.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11221 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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