Malicious PDF — malware analysis report

Static analysis result for SHA-256 0489c77639b826b1…

MALICIOUS

PDF

84.1 KB Created: 2020-11-24 15:42:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 2d2478e61b47c68ab0a6597589086cf3 SHA-1: e6a5681ae619b2792402b1bb28d7bfa885445600 SHA-256: 0489c77639b826b105ffc8e9651f830600117d2a120dc8285f5ccebcd3624feb
214 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, with one identified as a known malicious redirector. The heuristic firings indicate a PDF link farm designed to direct users to potentially harmful external sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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/strik?utm_term=eas+voice+generator In PDF document text
    • https://cdn-cms.f-static.net/uploads/4445116/normal_5fa3a1618279a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373297/normal_5f898aa430897.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380882/normal_5fad5b47db69b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475864/normal_5fbbda5c476ed.pdfIn PDF document text
    • https://gunefakojoxenaz.weebly.com/uploads/1/3/4/8/134886662/pukesedofa_lubuju.pdfIn PDF document text
    • https://kigejowozunafuf.weebly.com/uploads/1/3/4/8/134883406/roluxerorebusi.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/8279037.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489415/normal_5faf4097bd623.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417413/normal_5f97cdbfbb976.pdfIn PDF document text
    • https://nirawulef.weebly.com/uploads/1/3/4/3/134324477/juseram.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
    • https://uploads.strikinglycdn.com/files/bdaf09ac-84da-4ada-89a2-e197f0200307/70167088439.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5de710e-19e0-4d99-adcc-8093b59ec2c4/33735540166.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA22 6980 bytes
SHA-256: b39d650e43a810d29ff4986152e4419aa05ac2c8c5e058f4ab0f0890e6639c7f
font_01_sfnt_off0000dbf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF1 4740 bytes
SHA-256: d93784a61dddb4aace1c9c161b3ec50511010c5d6276d32d4d7fd6a739e601e9
font_02_sfnt_off0000ec16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC16 3556 bytes
SHA-256: cd532b4a63e1f9848684229df8751ab1f2bb4649e43cf626a6a15e043e005099
font_03_sfnt_off0000fa57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA57 10816 bytes
SHA-256: 4bfc45c64a22762658576061862aff504403abb024afea400b2339fd8e5b8729
font_04_sfnt_off00011f9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F9D 16036 bytes
SHA-256: 35d3440dae1ebc896564e4e6f70ea95aa3a30a1ac603c7fffbb21b68b8b72e2f
font_05_sfnt_off00013407.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13407 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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