PDF malware analysis — malicious · ffb100c48d00888c

MALICIOUS

PDF

72.0 KB Created: 2021-01-09 23:40:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03

MD5: 7f66f22a11ba17b898656a9991d50edc SHA-1: 46b2ca0d5c0d46c63d96b3f6774e40b7f1328af9 SHA-256: ffb100c48d00888c1ff48680773aa2c65e8becf014566ca787b4819e4dbcd178

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to host a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to 'guideline heart failure 2019 pdf'.

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://traffnew.ru/aws?utm_term=esc+guideline+heart+failure+2019+pdf PDF link annotation
- https://cdn-cms.f-static.net/uploads/4374838/normal_5f8a1c57dd324.pdfIn PDF document text
- https://site-1175722.mozfiles.com/files/1175722/dajebor.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4402717/normal_5fee9981eb0aa.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4480753/normal_5fec962823710.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4367312/normal_5f88b59c7ad89.pdfIn PDF document text
- https://cdn.sqhk.co/kavejufa/jiAheji/revolut_business_account_fees.pdfIn PDF document text
- https://cdn.sqhk.co/lazogapuvo/i37hghd/sarefupeloxun.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4379491/normal_5faaaddc0ece8.pdfIn PDF document text
- https://cdn.sqhk.co/gupikekarobo/ekhbgcC/nails_for_you_waukee_ia.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4460058/normal_5fa9e49790ae3.pdfIn PDF document text
- https://cdn.sqhk.co/digubamot/0RWu2jc/parallel_space_64_bit_support_apk_uptodown.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000dce5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDCE5	5856 bytes
SHA-256: `92d68a395519dee7aa4b961c8c6f0c8238b4d9b12e51427a50a1504b0310c368`
`font_01_sfnt_off0000f0cf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF0CF	10128 bytes
SHA-256: `f171dbb67568d824ce21fb4a42524e647ee3072cf97e39123a3a4013ad1564ba`

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