PDF malware analysis — malicious · 94afd0a0679fc3ee

MALICIOUS

PDF

75.0 KB Created: 2021-02-20 11:18:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 3f97a943fc6000ff4440a961c634c795 SHA-1: 71d96e533d8d2e9252cab6988c548cd106fafe32 SHA-256: 94afd0a0679fc3eeea23f318a31ae0426b4b82ad4376fd7f03cec4679c8a5684

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, with a critical heuristic identifying it as a "PDF_SEO_LINK_FARM". The document body, though heavily obfuscated, contains text related to a "channel guide" and application names, suggesting a lure. The presence of external URIs and the ML classifier output strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/wix?keyword=bloomington+il+channel+guide
- http://dresdenpharma.ru/wexabirufekiygkmh.pdf
- https://rovinimowi.weebly.com/uploads/1/3/4/6/134682499/3314326.pdf
- http://particulier-societegenerale.xyz/samsung_smart_call_app_keeps_stoppingwlogs.pdf
- http://dvigatel.guru/noroferenoviwaferapojuzedxzmy.pdf
- https://xedaliwim.weebly.com/uploads/1/3/1/4/131454603/4ee154b0c4.pdf
- https://zusajozaza.weebly.com/uploads/1/3/1/3/131381142/148121.pdf
- http://useraisins.pro/how_does_god_measure_a_manmvh6z.pdf
- http://nigasheff.xyz/dungeons_and_dragons_4e_booksh33qv.pdf
- https://pijolonaponezu.weebly.com/uploads/1/3/4/8/134879261/a7e64d8b42.pdf
- https://kafiwixuvaso.weebly.com/uploads/1/3/0/8/130874495/8582007.pdf
- https://zufefofavenubu.weebly.com/uploads/1/3/0/7/130775539/6737246.pdf
- http://resimpub.com/online_dictionary_spanish_to_english_free_translationkvitv.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://s3.amazonaws.com/tarajix/ansible_tower_free.pdf
- https://s3.amazonaws.com/zarusegibitumet/elgato_video_capture.pdf
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/xap/1.0/rights/
- http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000dd69.bin` `2b05debf0f1eb0dc752efe72a29d664ee737766bc0be5875b149d1775e84d5ec`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDD69	5128 bytes
`font_01_sfnt_off0000eeb4.bin` `87e017bd7a453da20ee427a5d1804368c1af8310c5b851635daedd863f7bda6d`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEEB4	15632 bytes

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