PDF malware analysis — malicious · 4a3d7742cc46770f

MALICIOUS

PDF

76.3 KB Created: 2021-03-16 18:04:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: b45c106177e31181c33e1f1eb7005118 SHA-1: 22efa9db97d31a07a487d8acbd3e5531c7fee565 SHA-256: 4a3d7742cc46770f20b4a9598312a34d7ec0447ee6afbe08f2966fd2b2111979

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, many of which point to PDF files hosted on Weebly and other platforms, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate maliciousness. The embedded URLs and the structure of the document suggest it is designed to trick users into downloading further malicious content, likely for phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9977

Heuristics 5

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

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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://seumenha.ru/award?keyword=believe+in+yourself+full+book+pdf+free+download
- https://watepiwod.weebly.com/uploads/1/3/2/7/132710700/4978009.pdf
- https://cdn.sqhk.co/tuponapalab/xYhdQgg/holland_america_cruise_and_fly.pdf
- https://lujajumivovun.weebly.com/uploads/1/3/0/7/130776132/paloxaxog.pdf
- https://foboxujegi.weebly.com/uploads/1/3/4/6/134694162/211cacaa.pdf
- https://lifitexuga.weebly.com/uploads/1/3/4/3/134356919/gozapurubedipakapema.pdf
- https://kefomituwo.weebly.com/uploads/1/3/2/8/132815939/3030422.pdf
- https://dovenokitumenu.weebly.com/uploads/1/3/1/4/131482991/noxukepoter.pdf
- https://vonuvevija.weebly.com/uploads/1/3/1/4/131407152/lurolopatosad.pdf
- https://mesasijodise.weebly.com/uploads/1/3/5/3/135315214/b563a1.pdf
- https://cdn.sqhk.co/nizivatitogu/caiehhW/waxifijigelad.pdf
- https://cdn.sqhk.co/jesisuvov/5gihffl/pokemon_go_december_2020_community_day.pdf
- https://sokowerifali.weebly.com/uploads/1/3/6/0/136053586/jufikanumosim_niteduvewur.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://s3.amazonaws.com/fidefofudi/asme_b31._3_2018_free.pdf
- https://s3.amazonaws.com/mulerux/90974665635.pdf
- https://s3.amazonaws.com/jedadokuti/2004_ford_focus_zx4_st_specs.pdf
- https://s3.amazonaws.com/telasebisu/19936849185.pdf
- https://s3.amazonaws.com/vavapekadoliti/cordless_phone_with_2.5_mm_headset_jack.pdf
- https://s3.amazonaws.com/dibedamoka/how_to_adjust_temperature_shower_faucet.pdf
- https://s3.amazonaws.com/fukepez/ya_lili_bass_boosted_song_pagalworld.pdf
- https://s3.amazonaws.com/mukutud/76192809230.pdf
- https://s3.amazonaws.com/sitok/kaspersky_antivirus_trial_version_free.pdf
- https://s3.amazonaws.com/sisaxu/average_income_of_a_wildlife_biologist.pdf
- https://s3.amazonaws.com/goveruduzewoxu/google_public_dns_android.pdf
- https://s3.amazonaws.com/lowuwofuxali/management_reporting_system.pdf
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://purl.org/dc/elements/1.1/
- http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000efbe.bin` `ae8bd70de6ba926852be9f849a8b7dd1a212f1fe6f6ac70b5665cbe2d27080e5`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEFBE	5544 bytes
`font_01_sfnt_off000102c1.bin` `b281429e289ba87b41cfcb49a18911df120482120d066db4f44d949bb4788a06`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x102C1	11100 bytes

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