PDF malware analysis — malicious · d95cb5b07c761892

MALICIOUS

PDF

64.8 KB Created: 2021-01-16 20:52:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16

MD5: b789940801b58155c62b0c7f37341765 SHA-1: d641c395a84daadc6821a0758a8a008cf5db9d0a SHA-256: d95cb5b07c761892c5a5938142bbc7b3cf1d8424e492cf023e607bfdb26e3c51

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'trafffi.ru', which is likely a phishing or malware distribution site, disguised as a free comic download. The document body, though heavily obfuscated, contains metadata related to the authoring application and creation date, suggesting it was programmatically generated.

Machine Learning

Nyx PDF Classifier malicious score 0.9996

Heuristics 4

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
External URI info PDF_URI

PDF contains an external URL action
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://trafffi.ru/123?utm_term=batman+year+one+comic+free+download PDF link annotation
- https://cdn.sqhk.co/ruzaxube/LiiNhhI/tower_defense_infinite_war_tephas_fork.pdfIn PDF document text
- https://sizelelam.weebly.com/uploads/1/3/4/8/134867910/siwojo-kupanutiza-vurovugasuxob-rujetobe.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4445877/normal_5fffed939d01d.pdfIn PDF document text
- https://vovikadu.weebly.com/uploads/1/3/4/5/134587732/siwivigur.pdfIn PDF document text
- https://vuzipelafow.weebly.com/uploads/1/3/4/6/134688966/faretu.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4427499/normal_5fc836b92b18d.pdfIn PDF document text
- https://site-1168371.mozfiles.com/files/1168371/bailey_s_story_book_report.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://s3.amazonaws.com/felasorarabipis/visulefiziwikawuvu.pdfIn PDF document text
- https://s3.amazonaws.com/godoremitiwuja/73068704263.pdfIn PDF document text
- https://s3.amazonaws.com/kakef/asphalt_7_android_free.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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000bfa4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBFA4	5232 bytes
SHA-256: `a70fc5ab1cd657f46bc776ecdad44653e1b48e59695e2afebf19991405432e16`
`font_01_sfnt_off0000d176.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD176	10256 bytes
SHA-256: `915a8c2b83b3f6c7b067e09966a583f5c9b4d5dbc8887916e0e7612cb6d1b83d`

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