PDF malware analysis — malicious · aefd661f27898f2f

MALICIOUS

PDF

71.3 KB Created: 2021-02-20 15:42:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22

MD5: 3bc9a6a79e9949d4a6eb1641ff215c28 SHA-1: 214caa2ff0155ac65f59c689247dde828ef00089 SHA-256: aefd661f27898f2ff8fcbf348696a8f5cf2145a41f7ac648f2d190b883af829a

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially malicious content. The document body, though heavily obfuscated, appears to be related to search terms for software, indicating a lure for users seeking specific applications.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

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://jottigo.ru/wix?keyword=androdumpper+pro+apk+latest PDF link annotation
- http://fexodubavilukub.22web.org/locker_group_perforated_metal_sheet_sizes.pdfIn PDF document text
- https://noduxulab.weebly.com/uploads/1/3/4/9/134901810/c71e83b9.pdfIn PDF document text
- https://lififamofupuge.weebly.com/uploads/1/3/4/3/134317858/vadagowe.pdfIn PDF document text
- https://nugukijozagesek.weebly.com/uploads/1/3/0/7/130739433/0f1d9fdc7.pdfIn PDF document text
- https://zikegebuner.weebly.com/uploads/1/3/4/8/134856814/3bcdd071c11.pdfIn PDF document text
- https://cdn.sqhk.co/sadirorig/1IYBjfH/fuvoxisu.pdfIn PDF document text
- https://zewemoledomuro.weebly.com/uploads/1/3/4/7/134746436/2366748.pdfIn PDF document text
- https://zabaparadasikid.weebly.com/uploads/1/3/4/3/134317604/toxegam-jewakanotefewa-latedolin-xajopukuziboxup.pdfIn PDF document text
- https://murexaxinafol.weebly.com/uploads/1/3/4/4/134456221/1b70fe6e6de9.pdfIn PDF document text
- https://lujukote.weebly.com/uploads/1/3/2/7/132712447/d99f1efe32d4.pdfIn PDF document text
- https://xitokudid.weebly.com/uploads/1/3/4/6/134688137/991727.pdfIn PDF document text
- http://ledojekukifal.iblogger.org/lotipolemademuxav.pdfIn PDF document text
- https://biwawabagukolaz.weebly.com/uploads/1/3/4/7/134730268/gakujoru_jakigoralubi_japosupogoxo.pdfIn PDF document text
- https://nalelijuw.weebly.com/uploads/1/3/4/5/134512153/bbe868a316e7.pdfIn PDF document text
- https://tafubevodila.weebly.com/uploads/1/3/4/0/134016741/1226650.pdfIn PDF document text
- http://znalomstvavip.site/dadadagetobifexijinepeif13i.pdfIn PDF document text
- http://lnstagramcentre.net/game_car_racing_gamephi1h.pdfIn PDF document text
- https://cdn.sqhk.co/sasuveze/SpjgYCx/fovanatodavifedidilurinis.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- http://zepibugab.rf.gd/basic_instinct_movie_in_tamil_hd.pdfIn PDF document text
- http://babupit.epizy.com/angry_birds_movie_tamil_tamilrockers.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_off0000ce9c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCE9C	4992 bytes
SHA-256: `b93de531aff62075ceee6391a4590f0dd69c0ac072dadbb863fb88cd07cb9562`
`font_01_sfnt_off0000df73.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDF73	9936 bytes
SHA-256: `a600ebdd3e27ebdb4b2c303e71f5ac169c4f9efb88658d8616423d7176b5dd7b`
`font_02_sfnt_off0001017b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1017B	4324 bytes
SHA-256: `b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c`

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