PDF malware analysis — malicious · bf48a48486343d4c

MALICIOUS

PDF

111.5 KB Created: 2021-02-24 20:49:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22

MD5: a0678debb996d737082016321116c8b3 SHA-1: 9a7113518d8e6b60d9c65446c4cff3e31eeb445b SHA-256: bf48a48486343d4cfd36c322049c267bbe60cb8d221c84e0675c04ad52a352c9

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of external links pointing to various domains, many of which appear to be disposable hosting. This behavior is indicative of a link farm, often used for SEO manipulation or to distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution through these linked PDFs.

Machine Learning

Nyx PDF Classifier malicious score 0.9996

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 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.
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://druttle.ru/wix?keyword=ground+plan+theater PDF link annotation
- http://xukewatamom.22web.org/bishops_stortford_college_uniform_shop.pdfIn PDF document text
- https://newadagunezadev.weebly.com/uploads/1/3/4/6/134684801/fozobavobepag.pdfIn PDF document text
- http://toredakaf.22web.org/supiririniravex.pdfIn PDF document text
- http://worelimupuvefam.mywebcommunity.org/93764809658.pdfIn PDF document text
- https://piwifagipob.weebly.com/uploads/1/3/1/3/131379899/305ade3629.pdfIn PDF document text
- https://lupawepenotude.weebly.com/uploads/1/3/1/6/131606523/sutixitilivotegavom.pdfIn PDF document text
- https://cdn.sqhk.co/fukafodifi/cljagh4/farm_bill_2020_explained_the_hindu.pdfIn PDF document text
- https://cdn.sqhk.co/pirujezexod/RUjfjjd/star_realms_board_game_rules.pdfIn PDF document text
- http://mobufuwiwid.medianewsonline.com/cub_scouts_uniform_cost.pdfIn PDF document text
- https://fisujurij.weebly.com/uploads/1/3/1/4/131437504/poweviwefonetegi.pdfIn PDF document text
- https://kibodoru.weebly.com/uploads/1/3/2/6/132695707/4163004.pdfIn PDF document text
- http://dosaxixapaxa.medianewsonline.com/5707227119.pdfIn PDF document text
- https://cdn.sqhk.co/mafokesaxuvi/Lihasmi/pancake_art_game_free_online.pdfIn PDF document text
- https://tovuwofox.weebly.com/uploads/1/3/4/7/134731163/3fa904.pdfIn PDF document text
- http://batezelokev.iblogger.org/scotsman_guide_commercial_lenders.pdfIn PDF document text
- https://wujenorap.weebly.com/uploads/1/3/5/3/135322769/6560327.pdfIn PDF document text
- https://cdn.sqhk.co/jinubodilev/ijjb556/hurricane_outbreak_gameplay.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://kosezofejesuxef.atwebpages.com/45691028756.pdfIn PDF document text
- https://s3.amazonaws.com/jikopot/mulowakamesufivexapigob.pdfIn PDF document text
- https://s3.amazonaws.com/xidazeze/sensor_ultrasonic_hc-_sr04_datasheet_espaol.pdfIn PDF document text
- http://jokosen.atwebpages.com/red_cards_in_joking_hazard.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_off00016c68.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x16C68	4736 bytes
SHA-256: `5d338fa9a1f28a8c4f32e01609b3ab39b42ed3973bcaafe03d8c673a4dae1c26`
`font_01_sfnt_off00017c74.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x17C74	10724 bytes
SHA-256: `7bbacf706a3180d4d54df53fa908e4bac784783b0de656571d4ada990d2ba80f`
`font_02_sfnt_off0001a0d5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1A0D5	4324 bytes
SHA-256: `a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f`

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