PDF malware analysis — malicious · 471da171d9bfb991

MALICIOUS

PDF

70.9 KB Created: 2021-01-19 16:54:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16

MD5: 30908ed21137fd5747d2899120f58bc3 SHA-1: e0abd06493d3bedd8a0498332f096dce21a782cf SHA-256: 471da171d9bfb99181d6d6f69c205379c72e50c13c02fb828ba4fc79d4d8c3f1

206 Risk Score

Malware Insights

MITRE ATT&CK

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

This PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious sites or download further payloads. The document body, though heavily obfuscated, contains references to 'earbuds manual' and 'game', likely lures to encourage interaction with the embedded links.

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://trafftec.ru/123?utm_term=jam+live+true+wireless+earbuds+manual PDF link annotation
- https://cdn.sqhk.co/fenazijeguk/Kigfhg2/dungeon_of_doom_game.pdfIn PDF document text
- https://fanazogi.weebly.com/uploads/1/3/0/9/130969494/fazitonujov-xumota.pdfIn PDF document text
- https://vafukomoruf.weebly.com/uploads/1/3/4/8/134862603/lezusodapi.pdfIn PDF document text
- https://livubefelamujir.weebly.com/uploads/1/3/4/8/134899239/vowabo.pdfIn PDF document text
- https://kudomedekekoki.weebly.com/uploads/1/3/4/6/134679488/kefarusel.pdfIn PDF document text
- https://site-1167992.mozfiles.com/files/1167992/minecraft_new_update_2020_september.pdfIn PDF document text
- https://cdn.sqhk.co/samigimas/UhdmfcA/istanbul_devlet_opera_ve_bale_mudurlugu.pdfIn PDF document text
- https://lilofuzaxodas.weebly.com/uploads/1/3/0/7/130775659/7054143.pdfIn PDF document text
- https://site-1173349.mozfiles.com/files/1173349/mdu_b__ed_admission_form_last_date.pdfIn PDF document text
- https://nupirunu.weebly.com/uploads/1/3/4/2/134265900/ruzofopofag.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://waxodomopupu.epizy.com/polesexepotoxanunidafuz.pdfIn PDF document text
- http://zukusuvajijip.epizy.com/64924991605.pdfIn PDF document text
- http://jabelakejirer.epizy.com/50952673319.pdfIn PDF document text
- http://vekoxoke.epizy.com/movie_er_website_for_pc.pdfIn PDF document text
- https://s3.amazonaws.com/tosego/64230808768.pdfIn PDF document text
- http://wosumobikufiw.rf.gd/nazozofituwesasiredufe.pdfIn PDF document text
- https://s3.amazonaws.com/perurulexi/zoology_1st_year_book.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_off0000cab2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCAB2	3288 bytes
SHA-256: `efabc2a51c37c7c5ea14eadbab94f318a5f21bbf5d8be52754c6de50e3353e23`
`font_01_sfnt_off0000d676.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD676	5252 bytes
SHA-256: `9929aa4200bbe394939d8a58deebd6f259c7df4eba629e045801144b69156ee2`
`font_02_sfnt_off0000e84e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE84E	11208 bytes
SHA-256: `b81a299787c4101c3b8227f3d8a024cc9ec29d83cb3858e71f96392447f71db3`

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