PDF malware analysis — malicious · 13bba8090ce3862a

MALICIOUS

PDF

76.5 KB Created: 2021-01-22 22:40:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03

MD5: b59626e75fe6803848cf96820d5df4a3 SHA-1: 8625082cc0177a9dedf3242dbc06a608ae1123cf SHA-256: 13bba8090ce3862a2389665ccaf3f0342a593f694e03e89521c3a25cc4825634

206 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a social engineering attack. It contains multiple external links, including one that impersonates a Bitlocker notification, likely intended to trick the user into downloading a secondary payload. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and SE_CLICKFIX heuristics further supports a phishing or malware distribution scheme.

Machine Learning

Nyx PDF Classifier malicious score 0.9996

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
ClickFix social engineering attack high SE_CLICKFIX

Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE

Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
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/aws?utm_term=bitlocker++windows+8.+1 PDF link annotation
- https://cdn.sqhk.co/bomemenun/IURhige/47843247930.pdfIn PDF document text
- https://site-1177693.mozfiles.com/files/1177693/puwuvuwarevulenibiram.pdfIn PDF document text
- https://cdn.sqhk.co/barugogip/2iajfF3/mtg_first_strike_deathtouch_rules.pdfIn PDF document text
- http://toguvuveleguna.22web.org/nowabezekabasid.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4481271/normal_5fe458579cfa5.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4404733/normal_5fda8bc917845.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4382621/normal_5fd62b1d4d8fc.pdfIn PDF document text
- https://site-1258672.mozfiles.com/files/1258672/70125256117.pdfIn PDF document text
- https://cdn.sqhk.co/zosiwutu/gijsF7h/icatchonline_online_crane_game.pdfIn PDF document text
- https://cdn.sqhk.co/vatuliwa/ZzieNEv/66051616288.pdfIn PDF document text
- https://site-1223179.mozfiles.com/files/1223179/fujawuluwagidetenivula.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4423453/normal_5fdf35049962b.pdfIn PDF document text
- https://site-1237828.mozfiles.com/files/1237828/4579935554.pdfIn PDF document text
- https://cdn.sqhk.co/guzunilepin/gechgLi/64337659307.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4481834/normal_5fe13d671e72a.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://dabemekos.epizy.com/grace_unplugged_song.pdfIn PDF document text
- http://bonitadobizaw.epizy.com/kixikabutapigawujusaduso.pdfIn PDF document text
- http://gawebunopom.rf.gd/batman_the_dark_knight_android_gameplay.pdfIn PDF document text
- http://gumusijejokezit.epizy.com/new_browsers_for_pc.pdfIn PDF document text
- http://jasigobup.epizy.com/79403555000.pdfIn PDF document text
- http://liwumulexajuvi.epizy.com/sumera.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_off0000daa5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDAA5	4996 bytes
SHA-256: `ab51ab20f112636a205e2a1ac09853b3f52153a030be11f871ec181f7dad772e`
`font_01_sfnt_off0000ebc4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEBC4	15552 bytes
SHA-256: `c450b4d6527f77e389fa39c90c33e1fddfc359c9630aedf9f4e8455cb1be9b5d`
`font_02_sfnt_off0001169e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1169E	4324 bytes
SHA-256: `d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378`

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