PDF malware analysis — malicious · 5c8ff2b69dbda694

MALICIOUS

PDF

74.2 KB Created: 2021-04-06 13:59:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10

MD5: dbc78c8808e09fc6396ccf68d2b8dd08 SHA-1: 14365b04efa9e136088238d2f2dc3369e595d849 SHA-256: 5c8ff2b69dbda694d2a84ca28e20b0fa61260bc6816ef9de18db87cbf49c985b

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF sample was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous URLs, with one prominent link to 'xezojetit.ru' likely serving as a lure to a phishing site. The document body, though heavily obfuscated, suggests a deceptive theme, potentially related to a hymn book, to trick users into clicking the malicious link. No scripts were extracted, but the PDF structure itself is indicative of a phishing attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9988

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://xezojetit.ru/123?utm_term=the+apostolic+church+hymn+book PDF link annotation
- https://cdn-cms.f-static.net/uploads/4467915/normal_5fd13b1d6afad.pdfIn PDF document text
- https://cdn.sqhk.co/reparepoki/ji1Yqwo/cube_survival_story_mod_apk_revdl.pdfIn PDF document text
- http://jiloxoxono.iblogger.org/padori.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4426810/normal_6052a827a5b2d.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4446930/normal_602faaea8cc24.pdfIn PDF document text
- https://lafuworopiraw.weebly.com/uploads/1/3/4/3/134341657/2e3e65a64f.pdfIn PDF document text
- https://cdn.sqhk.co/zaronafi/pidiavy/691397961.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4420018/normal_602c47a77ce45.pdfIn PDF document text
- https://lexezidelaxo.weebly.com/uploads/1/3/4/6/134605078/jivebu.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4454438/normal_605d918ad6f1a.pdfIn PDF document text
- http://wazumitizun.22web.org/ruxikisabifipugewu.pdfIn PDF document text
- http://tasenatalagotur.22web.org/livro_pedro_hernandes_dias_lopes.pdfIn PDF document text
- http://nilozususa.iblogger.org/errterung_deutsch_aufbau.pdfIn PDF document text
- http://fufoxewiwiv.iblogger.org/que_es_variacion_genetica.pdfIn PDF document text
- https://cdn.sqhk.co/liritefebat/hwm0ugc/joregisola.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://9e1b5e4e-b4ab-405b-8fdf-b3b6d7b19c28.filesusr.com/ugd/94ea38_4c0e5eda048242eeb0b615741f4bf921.pdf?index=trueIn PDF document text
- https://9df6e0af-a028-4e88-91ba-61a1b37318d5.filesusr.com/ugd/7c1f05_735f6bd5271f4124bf0ac9797273a31d.pdf?index=trueIn PDF document text
- http://mixipazotan.epizy.com/zaxipojexerus.pdfIn PDF document text
- https://abaaaae4-9231-44fc-b12c-ad55ebcc68e7.filesusr.com/ugd/2ca09c_64f9574fc97c4d6c95be51e2d110a2db.pdf?index=trueIn PDF document text
- https://f9c81679-ddb1-4746-ab40-32673edc426c.filesusr.com/ugd/2eff39_29823b9e3465435d8206ab57b8f4c758.pdf?index=trueIn PDF document text
- https://6d5fec37-5936-4ae8-8938-03a86e982f09.filesusr.com/ugd/d4da64_c9fb2fdc2b304875b8426a869dd4a7cd.pdf?index=trueIn PDF document text
- http://kusotuwomaru.epizy.com/79814801447.pdfIn PDF document text
- http://bujoraz.rf.gd/forifuguwilafaf.pdfIn PDF document text
- http://zovaner.rf.gd/casio_aw-80-1a2ves_manual.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_off0000d7c3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD7C3	5428 bytes
SHA-256: `cae65be6e3595b03b839660c173a8db119ea9bbd3be24f92c5c185fb3dd8e516`
`font_01_sfnt_off0000ea06.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEA06	4212 bytes
SHA-256: `babfaa6cfdbbcbde8be4c8adca8d965088eef827ee5ce3706ec76ccf2cde29d6`
`font_02_sfnt_off0000f5c8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF5C8	10920 bytes
SHA-256: `2243117a673a2da058d0e09931eaf890d01ff3435759e1573ddfb0beed959485`

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