PDF malware analysis — malicious · 3d0ecde8822b11ac

MALICIOUS

PDF

84.0 KB Created: 2021-06-08 10:28:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23

MD5: 6ff4faa87e8447bda41497aed81c5d19 SHA-1: c737178f5a9ea42aaaf2ab7f403a933fc9bb2bb5 SHA-256: 3d0ecde8822b11ace2170e9a53ba67658bb94770922ca88281d6e074dac506e3

194 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an invoice-themed lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 7

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 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.
Fake invoice / payment lure low SE_INVOICE_LURE

Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
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://pixomot.ru/pbw?utm_term=gizmos+titration+lab+answer+key PDF link annotation
- https://wuxigato.weebly.com/uploads/1/3/2/6/132680835/d4e6c9985bde288.pdfIn PDF document text
- https://dobukikiwaf.weebly.com/uploads/1/3/5/2/135295041/d209be2745dbd5.pdfIn PDF document text
- https://daburupolajiwu.weebly.com/uploads/1/3/4/6/134634816/wofanuwiwowi-konopowonix-revojovof-tuwupeju.pdfIn PDF document text
- https://wamukefak.weebly.com/uploads/1/3/5/3/135324497/rigazodukekeberebes.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4454171/normal_6041a31dcc2ce.pdfIn PDF document text
- https://rozapalevode.weebly.com/uploads/1/3/4/7/134705228/5248203.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4483602/normal_60378ecbceef8.pdfIn PDF document text
- https://merasata.weebly.com/uploads/1/3/1/3/131378960/b075925.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4420902/normal_5fe175cd2e0e6.pdfIn PDF document text
- https://xuwuperozaposa.weebly.com/uploads/1/3/2/3/132303395/2357493.pdfIn PDF document text
- https://ripapexogona.weebly.com/uploads/1/3/0/8/130874469/jevupidasesamu.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://lodenapokot.pbworks.com/f/lagokowisikozobarigiwipen.pdfIn PDF document text
- http://garifukedako.pbworks.com/f/job_description_of_a_medical_executive_assistant.pdfIn PDF document text
- http://pamotekegopa.pbworks.com/w/file/fetch/144450654/biosynthesis_of_unsaturated_fatty_acids.pdfIn PDF document text
- http://zusemivak.pbworks.com/f/13082038137.pdfIn PDF document text
- http://ditawulajobu.pbworks.com/w/file/fetch/144774867/jemagavumokirev.pdfIn PDF document text
- http://sazupamufode.pbworks.com/f/55873472601.pdfIn PDF document text
- http://tekitejug.pbworks.com/f/disade.pdfIn PDF document text
- http://zuzidezidaxi.pbworks.com/f/puxapabiweje.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f779.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF779	5312 bytes
SHA-256: `039171aebbd3152ab4a7065cf4d07cc89544e52c863ea1e057b136a7a37da316`
`font_01_sfnt_off00010991.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10991	10528 bytes
SHA-256: `3f89ab75f1dee939aba803ae360c35c827381f6c2d3898f6edfdff2d15b07beb`
`font_02_sfnt_off00012d75.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12D75	16076 bytes
SHA-256: `d14a31a02ce1c4152bb15d5126a0dec4416b44fa6c82943fd1949f8858d11b01`

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