PDF malware analysis — malicious · f7adfcb03e08a29d

MALICIOUS

PDF

69.6 KB Created: 2021-01-04 18:35:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16

MD5: 8d10864766d5959ffe3ab0a0ed9d94d8 SHA-1: 39b1eb7190f20f2d49414c7153a3aa6134aa3e7d SHA-256: f7adfcb03e08a29d83a57457f8f19cb2f3be6b53a40e5471f2fc1e004c197a4a

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains an embedded URI pointing to 'traffnew.ru', which is flagged as a malicious link farm. ML and ClamAV heuristics also identify this PDF as malicious, specifically a phishing or trojan variant. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create PDF documents from web content, further supporting the lure to an external site.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

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
Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
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=sample+audit+report+format+in+word PDF link annotation
- https://cdn.sqhk.co/wupifufexix/ahhgYRc/zuwus.pdfIn PDF document text
- https://nitetezelimon.weebly.com/uploads/1/3/1/4/131438651/59823d138b5b19.pdfIn PDF document text
- https://misamizejip.weebly.com/uploads/1/3/4/3/134348089/803521.pdfIn PDF document text
- https://vapifeti.weebly.com/uploads/1/3/4/7/134762900/muliw.pdfIn PDF document text
- https://penopamez.weebly.com/uploads/1/3/4/4/134496097/69c2b2d2b.pdfIn PDF document text
- https://gidavazowas.weebly.com/uploads/1/3/4/8/134863559/804119.pdfIn PDF document text
- https://fotobuwab.weebly.com/uploads/1/3/4/3/134368258/5950362.pdfIn PDF document text
- https://pojojozujivalim.weebly.com/uploads/1/3/1/1/131164399/7466003.pdfIn PDF document text
- https://cdn.sqhk.co/jekefebiba/OfVZhjF/dead_by_daylight_guide_for_beginners.pdfIn PDF document text
- https://rowevopa.weebly.com/uploads/1/3/1/8/131872281/e03e3d11fa81c42.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/39f146b8-2136-4fb1-88e0-8353ceadec08/vasidizonag.pdfIn PDF document text
- https://s3.amazonaws.com/xidulumexi/duvebaremibosofarilenoz.pdfIn PDF document text
- https://s3.amazonaws.com/mijedusovineti/sososonepamusofoke.pdfIn PDF document text
- https://s3.amazonaws.com/kudufigunabi/jonoxetetufotoxewepa.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/f7eadcc7-f716-4c64-abd7-174b2d366e6a/16601061985.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_off0000d46f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD46F	5204 bytes
SHA-256: `646f2045b10f5a20f36215fb18ab535864680edeb57156f8d94b66c2a49fa761`
`font_01_sfnt_off0000e61d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE61D	10312 bytes
SHA-256: `5f79bf698e41790959b59553ee4333925e9358541efab63f3cb4010ee15943ec`

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