PDF malware analysis — malicious · 7ce0d79cd027e801

MALICIOUS

PDF

74.5 KB Created: 2021-06-11 13:33:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25

MD5: aa7aae47e0ed0c63277c41bf80c3b694 SHA-1: 3ec7743d41c10dffc8f26bc5d8ef0a723bdbb166 SHA-256: 7ce0d79cd027e8016e8c5519c6231f88ad2dc1949ca358175d05a14b63c07247

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a heuristic firing for a link farm, with numerous external PDF links. One of the primary URLs, 'https://chcial.ru/pbw?utm_term=episode+generator+no+human+verification', suggests a lure related to content generation. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent, likely phishing or malware distribution via the embedded links.

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://chcial.ru/pbw?utm_term=episode+generator+no+human+verification PDF link annotation
- https://cdn-cms.f-static.net/uploads/4419644/normal_60bbea0f7a09e.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4482671/normal_6066e338dbc15.pdfIn PDF document text
- https://vudufidobisij.weebly.com/uploads/1/3/4/6/134673615/ninozodozaj.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4408460/normal_605fbb4b8ad10.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4489730/normal_6044cadbbcc4e.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4483335/normal_604494aaefde5.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4501037/normal_5fdcd3e2ccaac.pdfIn PDF document text
- https://felixitu.weebly.com/uploads/1/3/4/0/134012625/ae63a0379a2.pdfIn PDF document text
- https://xibuderopugef.weebly.com/uploads/1/3/4/0/134042602/be26cb1d3.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4485823/normal_605278133ddbb.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4380210/normal_605684276c6bc.pdfIn PDF document text
- https://neranutedaxujaw.weebly.com/uploads/1/3/1/4/131407849/0b86f83.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4453906/normal_5ff7fd1e09805.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4460251/normal_5fd3150b61093.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/5106a102-8d20-47de-aef4-8ba43c7654e4/ejercicios_lengua_6_primaria_santillana.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/214233f7-ec4c-4e9e-ab36-fd968ce05409/momugumagowemitivijudu.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/2f17a225-7cd5-4252-99ca-2dae02e82836/79458394007.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/8fd157fa-d3fb-4792-8f53-9c80566a54f5/22012250896.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/f1352787-4f69-4e86-8365-5493a72f8722/pesafaralelaratobuk.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/bb743e27-460f-4dc3-ad6a-c0871166a066/nojev.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/c6d9f2f1-7ea1-44dd-bee9-a1ebe9b3fce5/celine_dion_the_power_of_love_lyrics_video.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000dd14.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDD14	5552 bytes
SHA-256: `14b5988af233a72a64600ea799df1934e203f29703257e8f0a5910d810a08609`
`font_01_sfnt_off0000efd3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEFD3	2092 bytes
SHA-256: `0f740872c9ba99ba2808e86ca1aa710947acf25eef927d3004a187dd3557d740`
`font_02_sfnt_off0000f979.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF979	10084 bytes
SHA-256: `a5e4e53594d129d95d45d977f25d45ee53ef62f1a929d53b6d8222617e7abc48`

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