PDF malware analysis — malicious · 10d7af419e94009a

MALICIOUS

PDF

73.8 KB Created: 2021-01-23 22:10:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17

MD5: 26d8e2e6853cef1438a1a08a40d6e31f SHA-1: 63f0e67f4358c88972d86070e1bbc8f077e25ac7 SHA-256: 10d7af419e94009a59ca9673eb77ecaffb3d1ef4fdeba8318ff7d812c9a62bc3

206 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as Pdf.Phishing.Trojan. The document functions as a link farm, containing numerous external URLs that likely lead to phishing sites or further malware downloads. The presence of multiple disposable hosting links and UTM parameters suggests a campaign aimed at redirecting users to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 7

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 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.
Callback phishing phone lure medium SE_CALLBACK_LURE

Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
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://traffnew.ru/123?utm_term=nebraska+slow+pitch+softball+tournaments PDF link annotation
- https://cdn.sqhk.co/tisumusef/gjNBibB/toilet_and_bathroom_rush_game_online.pdfIn PDF document text
- https://cdn.sqhk.co/kixarozikej/ghbFD0U/midozomurezowulegisil.pdfIn PDF document text
- https://jakazopafekitab.weebly.com/uploads/1/3/4/6/134632018/5acf76a6a067.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4365539/normal_5fcaa73338a45.pdfIn PDF document text
- https://rapovadok.weebly.com/uploads/1/3/4/7/134705404/13fbfb34.pdfIn PDF document text
- https://cdn.sqhk.co/gadukupuwe/fgiEegf/topps_champions_league_2018_19_sticker_album.pdfIn PDF document text
- https://sumulepali.weebly.com/uploads/1/3/4/8/134882140/6500243.pdfIn PDF document text
- https://cdn.sqhk.co/benibavagoge/gfjieij/kaiser_pharmacy_hours_near_me.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4471711/normal_5ff96f2d848ac.pdfIn PDF document text
- https://cdn.sqhk.co/xuxiropuwomo/OhcxiiI/28758544531.pdfIn PDF document text
- https://kudowelevuk.weebly.com/uploads/1/3/4/5/134585456/kavibawu.pdfIn PDF document text
- https://cdn.sqhk.co/fejavegiwo/h2jfbid/phil_swift_soundboard.pdfIn PDF document text
- http://gewarum.66ghz.com/13623950266.pdfIn PDF document text
- https://fefodenajefive.weebly.com/uploads/1/3/1/4/131437461/paligewuxiwik.pdfIn PDF document text
- https://cdn.sqhk.co/genopeno/iifXjcQ/et_music_player_pro_4pda.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://jajunoz.rf.gd/usb_voltage_control_software.pdfIn PDF document text
- https://s3.amazonaws.com/xuzed/gifesapeb.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_off0000d4d6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD4D6	5400 bytes
SHA-256: `71d95a048ec7207583d6ac3b106bc103fb5dbe01ee27828ab91f23a94d799b1c`
`font_01_sfnt_off0000e718.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE718	10952 bytes
SHA-256: `a755195f1f20b225b38f1832c550c7fb359193d3db545db9591deb92427d0632`
`font_02_sfnt_off00010bde.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10BDE	4324 bytes
SHA-256: `4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3`

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