PDF malware analysis — malicious · 4ad855355051c519

MALICIOUS

PDF

70.5 KB Created: 2020-12-21 04:53:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16

MD5: 947971e094f53c420ac2d59835a4c111 SHA-1: ecf0064a960311101622d39353c499640eb20e30 SHA-256: 4ad855355051c51990833ff762d0cbe6b45461f782cb60230b48d5bf0fd213eb

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URL pointing to 'traffking.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to an 'answer key', aligning with phishing tactics.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

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://traffking.ru/aws?utm_term=grammarway+1+answer+key+pdf PDF link annotation
- https://cdn-cms.f-static.net/uploads/4450638/normal_5fb5aa2f3c9c8.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4380539/normal_5fbe3751be5c9.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4491439/normal_5fb309182a7e7.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://static1.squarespace.com/static/5fdfcc9592ab3d568945385c/t/5fdfdeccfb7de13a647c4a35/1608507084908/dosuwapirifu.pdfIn PDF document text
- https://s3.amazonaws.com/rekawexuretowo/zelowoxakadavone.pdfIn PDF document text
- https://static1.squarespace.com/static/5fdc9bbe50f46d6500014148/t/5fdd240cc2a62f57ac22e324/1608328204190/bicsi_tdmm_13th_edition_manual.pdfIn PDF document text
- https://s3.amazonaws.com/guvovigo/creon_dosing_guide.pdfIn PDF document text
- https://s3.amazonaws.com/sivanira/vast_survival_mod_menu_apk_2020.pdfIn PDF document text
- https://s3.amazonaws.com/wuzalugiseto/tudofukirodonab.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/4710a607-b2e0-4b86-b9d3-68971c03a0b9/dabepuzulu.pdfIn PDF document text
- https://s3.amazonaws.com/dotivaf/52778636212.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_off0000d678.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD678	5496 bytes
SHA-256: `53b568e733178e321d8f0138116a98a86fe5e0510ba67919bebe10fd942c596a`
`font_01_sfnt_off0000e93c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE93C	10592 bytes
SHA-256: `3f55be36e5ed691f68ca84cb97dcc33f02a3e6a14a2869df0b4b32a3877f70c4`

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