Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ad53dba6fd52ae8…

MALICIOUS

PDF

67.3 KB Created: 2021-01-02 15:07:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 4af3fa3da11131abb636a3978a0f160d SHA-1: 9556e63f9c49ea8e45bdc45e7a02c66ed57d1274 SHA-256: 6ad53dba6fd52ae871d0a11c4de2baf001f543003df394ee6fa2ee11fe525122
214 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to link farms and redirectors, indicating a malicious intent to distribute further content or malware. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' specifically flags a link to 'traffking.ru', suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection further support the malicious nature of this PDF.

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/123?utm_term=handbook+of+applied+behavior+analysis+fisher+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4391602/normal_5f9da910b46dc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446286/normal_5fcf20701717b.pdfIn PDF document text
    • https://rixafewokeget.weebly.com/uploads/1/3/0/7/130739987/jovetagadi-wagoxajax-fobapabokowasul.pdfIn PDF document text
    • https://fafotarume.weebly.com/uploads/1/3/1/0/131069904/78cd5ad411cd16.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368972/normal_5fc05db732f32.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464327/normal_5fd197b8c68b8.pdfIn PDF document text
    • https://ganakinupep.weebly.com/uploads/1/3/4/5/134599301/wekumixavomu.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/a0622039-7fa3-4c74-88b6-64e2e2b70e6d/30788798056.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b91f762e-f372-42e1-b667-0572f7d07bf0/tepurewiputodizon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a150bad8-940b-4710-82c1-422279f8ceec/wulirozamozogulul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0dd0c6e2-0d22-48aa-84d7-4f82204768f4/gaxudurojog.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_off0000c917.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC917 5456 bytes
SHA-256: 1ef853c9f3cee894ca1e6be24f0b9e66344790c36e39e41d58654b1b8eac7d6e
font_01_sfnt_off0000dba2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBA2 10728 bytes
SHA-256: 6c2d84f4be569e6726bc1c39028cf138e61228b0f65e013760e14d6abe2bec50

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