PDF malware analysis — malicious · 5552dce016119e10

MALICIOUS

PDF

88.1 KB Created: 2021-02-27 14:17:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11

MD5: 70c306426862b4fc5bc308a1f268c159 SHA-1: 660215aa0a4d2cb6229f6d958a31fec0398893c4 SHA-256: 5552dce016119e1073ff83e8c83d01722e959fae07df9225c5834612642d2c1e

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It contains numerous external URIs, suggesting it's part of a link farm designed to redirect users to malicious sites. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create malicious PDFs.

Machine Learning

Nyx PDF Classifier malicious score 0.9995

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 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.
Urgency / deadline lure low SE_URGENCY_LURE

Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
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://bologen.ru/award?keyword=vicks+starry+night+humidifier+green PDF link annotation
- https://cdn.sqhk.co/gozafavapawu/MigEjdi/dubai_racing_2_live.pdfIn PDF document text
- https://lapolepep.weebly.com/uploads/1/3/1/4/131406498/7289817.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4428329/normal_5fe0744605bc9.pdfIn PDF document text
- http://rivozuzeno.mywebcommunity.org/63021708957.pdfIn PDF document text
- https://cdn.sqhk.co/gutinisiv/fPghGgf/77125568011.pdfIn PDF document text
- http://tegor.xyz/56868849586tf948.pdfIn PDF document text
- https://zabugejagovim.weebly.com/uploads/1/3/1/6/131637755/7982027.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4426945/normal_600b50550b94d.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4365655/normal_60387e9bcbae2.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4459796/normal_5febea2f75d89.pdfIn PDF document text
- http://semengergel.ru/nirawobodasulululowenomajvo6y.pdfIn PDF document text
- https://dofuzubakav.weebly.com/uploads/1/3/1/6/131606612/ziriweli.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4420586/normal_5feb634aa1afd.pdfIn PDF document text
- http://itwomen.space/craigslist_sf_bay_area_personals_missed_connectionsmo6lc.pdfIn PDF document text
- https://febefadu.weebly.com/uploads/1/3/1/4/131453100/1527490.pdfIn PDF document text
- http://digitalliteracyinstitute.com/leatherworking_classic_guideftjof.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.opentle.orgIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- http://vunonam.atwebpages.com/what_is_complex_trauma_in_mental_health.pdfIn PDF document text
- http://tavoxelelenasi.onlinewebshop.net/amc_8_2020_scores.pdfIn PDF document text
- http://refusunono.onlinewebshop.net/star_wars_unlimited_power.pdfIn PDF document text
- http://diwavubodinaroj.myartsonline.com/full_metal_jacket_opening_scene_script.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://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f82f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF82F	5304 bytes
SHA-256: `186a0f1193c2f2798bc8563c02362f8dc88a0bac3bea2b8733540a7d41bbb4c6`
`font_01_sfnt_off000109fa.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x109FA	7660 bytes
SHA-256: `c529723fd3101f742ad4d6fb2fb9e31a1e59c5fc62b8360d6e53c5b86e641857`
`font_02_sfnt_off00011f2b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11F2B	10716 bytes
SHA-256: `3ecc6647eceab772669eb8cde06112750508a8007e0df0ddae21de0fd475e820`
`font_03_sfnt_off000143d4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x143D4	4324 bytes
SHA-256: `cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34`

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