PDF malware analysis — malicious · 5d976696266eebfa

MALICIOUS

PDF

81.7 KB Created: 2021-02-13 13:05:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05

MD5: d97cbf20e15fbd4c27a68aa397cfd118 SHA-1: 0412d5be5a8b0aae4a284807e897a11acc1f0e31 SHA-256: 5d976696266eebfae5a89b4f8471e727f22352a6640b6150c9445090f6c9a7db

244 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and flagged by an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal a significant number of embedded links, many pointing to disposable hosting and redirector infrastructure, suggesting a link farm designed to distribute malicious content or phish users. The presence of a link to 'yafferge.ru' further supports the phishing or malware distribution vector.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

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
PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK

PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
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.
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://yafferge.ru/wix?keyword=word+choice+worksheets+with+answers+pdf In PDF document text
- https://kakerenu.weebly.com/uploads/1/3/1/0/131071145/gafiwekifu-towufopo-tebozegafagoves.pdfIn PDF document text
- https://suzazenesegi.weebly.com/uploads/1/3/0/7/130776168/wexezazudogofa.pdfIn PDF document text
- https://vufobuvi.weebly.com/uploads/1/3/1/1/131163959/baguwupekazixa-vufigoxebuziteb-gufimapa.pdfIn PDF document text
- https://cdn.sqhk.co/zesonixiv/gDMbihf/spinosaurus_skeleton_museum.pdfIn PDF document text
- http://nozozofodedeza.iblogger.org/42062505852.pdfIn PDF document text
- http://jofarofuwudeveb.66ghz.com/37991867037.pdfIn PDF document text
- https://cdn.sqhk.co/moromasi/gdqXhdf/52778926224.pdfIn PDF document text
- https://cdn.sqhk.co/wepurodapike/jegegjb/luwaxudan.pdfIn PDF document text
- https://cdn.sqhk.co/xajimujigaju/6ieJkFq/galaxian_arcade_cheats.pdfIn PDF document text
- https://cdn.sqhk.co/gogerazina/jSnzoij/retroarch_android_roms_download.pdfIn PDF document text
- https://cdn.sqhk.co/vinasujitupe/fHhgRty/png_funny_video_clips_free_download.pdfIn PDF document text
- https://cdn.sqhk.co/fefuxumito/gjwhYii/facebook_app_installer_manager_android.pdfIn PDF document text
- http://lokifasumefi.iblogger.org/nester_emulator_for_pc.pdfIn PDF document text
- http://fuvafutiku.22web.org/football_split_back_formation_plays.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://retetopipazaned.epizy.com/kawedefe.pdfIn PDF document text
- http://zapudeni.epizy.com/ashes_cricket_game_apkpure.pdfIn PDF document text
- http://xewenofos.epizy.com/sas_libname_excel_sheet.pdfIn PDF document text
- http://kejakum.rf.gd/kozawerafevijodiw.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_off0000e5f3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE5F3	5380 bytes
SHA-256: `9de598bdc9fef69b8ce226fcfe65bb79fe984c6cebc74504eca09bcd57515dc1`
`font_01_sfnt_off0000f859.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF859	14036 bytes
SHA-256: `8e41e1e269ab3ea43c3238096a980e95a7c66711809e979185006f1081931eb4`
`font_02_sfnt_off0001247e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1247E	16084 bytes
SHA-256: `12e1bdea5fc73f205daff8bbc4573b4c6e5ba94205cf5b3440f65e61b625f0f0`

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