PDF malware analysis — malicious · 5323d6bf5c70c89a

MALICIOUS

PDF

76.5 KB Created: 2021-05-26 14:25:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23

MD5: 6e0ee492df06692c6e4a35b8ddb6e144 SHA-1: 08b2aa9786b901af460fa20f1669f2f8c0144407 SHA-256: 5323d6bf5c70c89a438bdc0d55f249d4173d4fd245af14fd21e5e0f2d79201c8

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, a common tactic for link farms and phishing. The primary URL, 'https://soxebez.ru/strik?utm_term=formel+omkrets+trekant', suggests a lure related to geometry, likely to deceive users into clicking. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

Nyx PDF Classifier malicious score 0.9996

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
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://soxebez.ru/strik?utm_term=formel+omkrets+trekant PDF link annotation
- https://static.s123-cdn-static.com/uploads/4366661/normal_5fde770503449.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4375203/normal_60076a0b9b5a1.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4488560/normal_5fd8436cf336f.pdfIn PDF document text
- https://zusifupovososix.weebly.com/uploads/1/3/2/6/132680896/819dff419562.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4417824/normal_601e7403cd040.pdfIn PDF document text
- https://sogekapi.weebly.com/uploads/1/3/4/8/134891770/7060622.pdfIn PDF document text
- https://butemupow.weebly.com/uploads/1/3/5/3/135338881/rabupijuvur-wabiwew.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4482617/normal_5ff7f07c6f0ae.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4481161/normal_6029382c57fd8.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4374203/normal_600d5d486b75f.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4365540/normal_6006f7c647fe9.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4458849/normal_5fc5f4b9e6455.pdfIn PDF document text
- https://zunolerafoxate.weebly.com/uploads/1/3/4/8/134871884/fofonovugowawa_moraxaredavara_joxokiwa.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4453142/normal_60348625e994d.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/2345c7b7-30bc-4f1e-9967-37cdfdb66c16/john_deere_lawn_mower_prices_nz.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/3c463057-5a81-4028-8d5c-e44bbd13fdd8/jugegoloxazusawuwunagez.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/45aef7f7-7f5a-4c0a-8003-3feb2231fae0/buleborobazomiveleletopi.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/8a569620-69e7-431d-a2b7-6d86997025eb/zadikazow.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/c3c4746e-0fb6-4f7c-ba97-8db63b329c77/42828468043.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/b6ca371b-3018-49ed-9ae1-3420467e0aca/filipino_knife_fighting_style.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/81b011c4-77bb-4ffd-a103-ea0cff3e9499/new_york_baroque_dance_company.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
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000d740.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD740	4852 bytes
SHA-256: `a4056b2e2bed4e42c1cd36f3857ee1b46d102e6ffc9adb89cb0d228933c1e559`
`font_01_sfnt_off0000e7a5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE7A5	11392 bytes
SHA-256: `7eddc6f2d7e5cf433829bfec16bd4251605a00b286e8b49f6f2023f69a1a5746`
`font_02_sfnt_off00010de2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10DE2	16132 bytes
SHA-256: `8437eb0249ba66f2c38f5714a7d924f5c637890f6398f7e446e14fcaa641f5fa`

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