PDF malware analysis — malicious · 031aa18bc956175a

MALICIOUS

PDF

83.5 KB Created: 2021-04-17 08:50:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23

MD5: 57437a3c31aebac278982b7f8708ed6f SHA-1: 1cc5390d0007e9d2e201cb4dacf601c4f5af54c3 SHA-256: 031aa18bc956175a9b45f84509b27a84cb9d9613185f1f4d2aace3bf73a993b2

166 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a clipboard-command (paste-and-run) lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9992

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE

Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
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://pelibifir.ru/strik?utm_term=kali+linux+installation+command+android PDF link annotation
- https://cdn-cms.f-static.net/uploads/4475863/normal_603740d71402b.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4470040/normal_605d5d410402a.pdfIn PDF document text
- http://mazisim.mywebcommunity.org/12259831036.pdfIn PDF document text
- http://makamar.xyz/pibojimelifabobiruraf088w6.pdfIn PDF document text
- http://lofajemami.sportsontheweb.net/tilasora.pdfIn PDF document text
- http://appeal-ig.com/90017491145ecufh.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4414352/normal_5fec67813746d.pdfIn PDF document text
- http://begemotiks.fun/xedifozatimaviz0.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4377371/normal_60072cbd25d18.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4422180/normal_60137846341e0.pdfIn PDF document text
- http://fastgetme.online/wake_surfing_mastercraft_prostar_190bowcp.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4380694/normal_6052e5dfac2f3.pdfIn PDF document text
- http://gakagebir.mypressonline.com/liwagawakebigujuxir.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4378848/normal_603cfca6171f6.pdfIn PDF document text
- http://tokio-2020.fun/wosomop93f81.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/4d26d31b-bac6-43f1-8c68-7295e9a0f902/62168448030.pdfIn PDF document text
- https://s3.amazonaws.com/vuxalirudidel/87139241376.pdfIn PDF document text
- https://s3.amazonaws.com/lopadivupudexa/newubo.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/6b6b91b4-c108-4660-91df-923909a65c89/best_android_app_for_calorie_counting_indian_food.pdfIn PDF document text
- https://s3.amazonaws.com/zukogi/zip_file_extractor_for_windows_8.pdfIn PDF document text
- https://s3.amazonaws.com/xubifupi/nolububirusetijigog.pdfIn PDF document text
- https://s3.amazonaws.com/kosamupim/kupakividutajijowatoguw.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/d53b5f83-fdaa-45f5-8f67-12eee9820732/lajawu.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_off0000f2e8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF2E8	5124 bytes
SHA-256: `f5e9199412f2a94198a1314f67d64ad456e869483ee0a10b1dde658180d5481b`
`font_01_sfnt_off00010442.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10442	11208 bytes
SHA-256: `a7ab41fdee115dac0335c5aed7e70c66ae421be9b9688374494d813477d3cf0e`
`font_02_sfnt_off00012abd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12ABD	16204 bytes
SHA-256: `a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd`

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