Malicious PDF — malware analysis report

Static analysis result for SHA-256 f66284d3cc2f4d89…

MALICIOUS

PDF

68.4 KB Created: 2020-12-19 07:59:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 58b8fc4f52b64b4c9c2927956b36360d SHA-1: 3476a1c60754e7e9918198d7f650179667cc27e4 SHA-256: f66284d3cc2f4d897bb361522e71c17ef0ef635bced664863b67a1726504761f
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier, indicating it is likely a phishing or redirection attempt. It functions as a link farm, containing numerous embedded URLs that point to various hosting services, with at least one URL identified as a known malicious redirector. The primary purpose appears to be directing users to external, potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffking.ru/strik?utm_term=and+still+we+rise+miles+corwin+pdf In PDF document text
    • https://kokexofagisukop.weebly.com/uploads/1/3/2/7/132710589/xeledax-dawevupexo-sumulawofebot.pdfIn PDF document text
    • https://misamizejip.weebly.com/uploads/1/3/4/3/134348089/a1967cc78ff4.pdfIn PDF document text
    • https://sibitolifi.weebly.com/uploads/1/3/4/7/134732274/lokaxivagu.pdfIn PDF document text
    • https://bavifogo.weebly.com/uploads/1/3/4/5/134524367/02f23be75.pdfIn PDF document text
    • https://jutixabit.weebly.com/uploads/1/3/4/0/134017524/lizezunewipat.pdfIn PDF document text
    • https://vujofuda.weebly.com/uploads/1/3/4/3/134375628/mewenepenutezodi.pdfIn PDF document text
    • https://ruwatija.weebly.com/uploads/1/3/4/8/134846771/066e6.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/9d53a188-08bb-43e7-9c59-e41d8e67ae2e/74558982346.pdfIn PDF document text
    • https://s3.amazonaws.com/juzewojavomofew/dietary_guidelines_for_low_sodium_diet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab7a5c58-7dfa-4590-86d2-02d93b9f5769/71662814889.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0dc3c43-c90d-4e75-bf47-7def7d019d1b/zudet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb2e0278-c646-4608-aa60-d78993f68573/the_sellout_paul_beatty.pdfIn PDF document text
    • https://s3.amazonaws.com/legesiliv/97727221654.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63a63aea-1413-49bf-901f-c5c703737234/o_come_o_come_emmanuel_piano_guys_ce.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26e0df31-bb6c-4496-87c4-b34d6d628a60/81763145458.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46f3669a-21e7-40d7-925e-35631a4d7c94/povana.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e21011e-1377-4066-867c-2ec3ac3efaae/77395471817.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_off0000d1dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1DC 5172 bytes
SHA-256: 3f24dbcb17ff508042930c067b024b304f62354529326635ba0581e9d7e7c080
font_01_sfnt_off0000e377.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE377 9772 bytes
SHA-256: ae6bd5d9657d1b6263c5b3764b5e2f4fe9eeefaca76ee692a155fc0e4e8ae738