PDF malware analysis — malicious · 27748e48277dbd4c

MALICIOUS

PDF

78.7 KB Created: 2021-02-23 03:47:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26

MD5: af56b5c535ff01060461ef58a89108d6 SHA-1: 4e75c225e911a4787227c24f009dab3cb20fdd7c SHA-256: 27748e48277dbd4c48937e80841bedfcbd0bf64db085c5623012d0d05a35b908

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of external links, many pointing to disposable domains or link farms, suggesting a malicious intent related to SEO manipulation or phishing. The ML classifier and ClamAV detection strongly indicate maliciousness. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

Nyx PDF Classifier malicious score 0.9996

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
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.
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://bologen.ru/123?utm_term=303+squadron+battle+of+britain+walkthrough PDF link annotation
- https://cdn.sqhk.co/gejixoneku/PWCiiij/global_citizenship_definition_unesco.pdfIn PDF document text
- https://topemarepebide.weebly.com/uploads/1/3/4/3/134316461/54019c6e8175ae1.pdfIn PDF document text
- https://cdn.sqhk.co/fifapupifig/ier5Njf/nofawiditonobawata.pdfIn PDF document text
- https://telisawe.weebly.com/uploads/1/3/4/4/134466193/fotenififonuj-tepige.pdfIn PDF document text
- https://romugazasemagop.weebly.com/uploads/1/3/4/8/134897733/845300.pdfIn PDF document text
- https://cdn.sqhk.co/jutusaxibu/jhMifhh/celebrity_voice_changer_app_price.pdfIn PDF document text
- https://rinuvimasajef.weebly.com/uploads/1/3/2/6/132695862/rikudaz.pdfIn PDF document text
- https://cdn.sqhk.co/tivinarafuvu/cyxcuAr/18297134127.pdfIn PDF document text
- https://cdn.sqhk.co/zosurinipin/qhjhagf/roblox_mining_inc_codes_2020.pdfIn PDF document text
- https://kotezoxeruv.weebly.com/uploads/1/3/5/3/135345651/vamel-voxozibatiruf.pdfIn PDF document text
- https://zunodeni.weebly.com/uploads/1/3/1/0/131070331/952644582.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://s3.amazonaws.com/padanivozeb/black_body_radiation_physics.pdfIn PDF document text
- https://s3.amazonaws.com/salosibejodod/kijape.pdfIn PDF document text
- http://nivovagemesow.rf.gd/boulter_buderus_oil_boiler_manual.pdfIn PDF document text
- https://s3.amazonaws.com/dujepav/nisud.pdfIn PDF document text
- https://s3.amazonaws.com/bejikefowu/dragon_ball_z_android_17_revived.pdfIn PDF document text
- https://s3.amazonaws.com/tuxalowafokuvo/lafukixuxemurup.pdfIn PDF document text
- http://xuzinom.epizy.com/angioedema_treatment.pdfIn PDF document text
- http://ripeterub.epizy.com/18742433450.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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000c873.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC873	5800 bytes
SHA-256: `db3332372c8f8d006bb19d619f02a9d54130556f96686f5b988a92b958ca4798`
`font_01_sfnt_off0000dc31.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDC31	5548 bytes
SHA-256: `0298bf9fe0c23ee385513a6ed844d27ce54aad5cfe7b6752aa54a7d5e4ad1931`
`font_02_sfnt_off0000efd4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEFD4	10996 bytes
SHA-256: `6c7c8bf5e1b709c64ee4c600580cf892b60c1b7d6610ba5c0b27178c26f59dcd`
`font_03_sfnt_off000115ad.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x115AD	16204 bytes
SHA-256: `31aa257675234f953cb39254c73a0c002637764ec2691c470e0912636c3685cf`

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