PDF malware analysis — malicious · b43039c061e7eeca

MALICIOUS

PDF

72.6 KB Created: 2020-12-17 07:08:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23

MD5: 3d454c10028930ea09e94c12e1848d39 SHA-1: 8669086500382c060dec60bfbf08bf84c67102b1 SHA-256: b43039c061e7eeca4aafc01eff2377ac8ddd7a917c0058918a0c682e8e909c10

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF document identified as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to 'https://trafficel.ru/wb?keyword=datasheet%20of%20arduino%20uno%20atmega328', which is likely a lure to download a secondary payload. The document body, though heavily obfuscated, suggests a datasheet context, reinforcing the phishing pretext.

Machine Learning

Nyx PDF Classifier malicious score 0.9995

Heuristics 4

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://trafficel.ru/wb?keyword=datasheet%20of%20arduino%20uno%20atmega328 PDF link annotation
- https://static.s123-cdn-static.com/uploads/4376621/normal_5fcf616824d45.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4411252/normal_5fa4dc3ec5ef8.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/b827e06e-9e8b-4293-bbeb-063ce7df53bc/zusivaselujajufojaja.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/f595f9b0-8660-4893-9c91-b839eb78e8fd/vakuzivipalarez.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/3e8b35c8-f5e1-4778-aef1-3f6245aca5ad/27692242289.pdfIn PDF document text
- https://s3.amazonaws.com/lolaritemukole/5077068131.pdfIn PDF document text
- https://s3.amazonaws.com/navoburarovada/piggie_pie_book_online.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/6df94214-e14d-477a-b8dc-92a773d18eee/dalifibezul.pdfIn PDF document text
- https://static1.squarespace.com/static/5fc6df4944e997374a292d60/t/5fcd6a1b8a55f2188b8b73c5/1607297564448/raiden_moves_mortal_kombat_x_ps4.pdfIn PDF document text
- https://s3.amazonaws.com/woxotopapozokev/describing_people_s_clothes_worksheet.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_off0000dd5f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDD5F	5776 bytes
SHA-256: `b77bfcd97604f5092391edeb7908635abfc69bc2a1b709e4f0910396ab0defe9`
`font_01_sfnt_off0000f0e7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF0E7	10808 bytes
SHA-256: `7e8e1693ba304724841f8e39d9c75b08b849c4040b604c0eb51f6d4648d391ae`

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