PDF malware analysis — malicious · a641295d06cb7bf6

MALICIOUS

PDF

78.3 KB Created: 2021-02-19 00:31:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04

MD5: a29396a84898f1cc81c125ca88786abb SHA-1: 9da187aa1250e88d014874f637bbcfaec9e0161e SHA-256: a641295d06cb7bf6302e3f947898843204d9a72e678e3cd0a91d2b63e2faf007

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The embedded content, though heavily obfuscated, appears to be a lure for an APK download. The ML classifier strongly indicated maliciousness, and the presence of many external links points towards a tactic of directing users to potentially harmful sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9992

Heuristics 5

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=key+root+master+mod+version+1.3+6+apk+download PDF link annotation
- https://nexuragero.weebly.com/uploads/1/3/4/7/134751893/delonokifej.pdfIn PDF document text
- https://cdn.sqhk.co/vobilurerire/egdghie/pokemon_go_wallpaper_for_phone.pdfIn PDF document text
- https://cdn.sqhk.co/tatidukigag/Ohikiic/wings_of_fire_book_14.pdfIn PDF document text
- https://lekofubazag.weebly.com/uploads/1/3/1/8/131872104/4379576.pdfIn PDF document text
- https://vobolatit.weebly.com/uploads/1/3/4/3/134349562/6436947.pdfIn PDF document text
- https://cdn.sqhk.co/levowexesu/ggidrDr/navabe.pdfIn PDF document text
- https://cdn.sqhk.co/loxexafetivu/iayiiA9/calculate_percentage_between_two_numbers_c.pdfIn PDF document text
- https://ponefapu.weebly.com/uploads/1/3/1/6/131637257/3078483.pdfIn PDF document text
- https://cdn.sqhk.co/rusobotakox/heEigjj/92059621099.pdfIn PDF document text
- https://mebodamuruwij.weebly.com/uploads/1/3/5/4/135400263/7349858.pdfIn PDF document text
- https://cdn.sqhk.co/benibavagoge/bEfibha/scrap_copper_prices_near_me.pdfIn PDF document text
- https://fukoroxovelamos.weebly.com/uploads/1/3/0/7/130776486/9564628.pdfIn PDF document text
- https://cdn.sqhk.co/sugefixa/jhiqJgj/american_metals_market_index.pdfIn PDF document text
- https://cdn.sqhk.co/potasuregoz/LgcPjhW/77826015465.pdfIn PDF document text
- https://cdn.sqhk.co/riragimi/BjciDqx/73635975508.pdfIn PDF document text
- https://lejuziluzamof.weebly.com/uploads/1/3/4/8/134863123/6196978.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://s3.amazonaws.com/genukopapovixo/vpn_android_gratis_semua_negara.pdfIn PDF document text
- https://s3.amazonaws.com/baxegezivumi/gukuseba.pdfIn PDF document text
- https://s3.amazonaws.com/gorajikunobixi/68329139354.pdfIn PDF document text
- https://s3.amazonaws.com/nisiwanolom/zulozalopode.pdfIn PDF document text
- https://s3.amazonaws.com/xuzed/dirulufuriberabadusan.pdfIn PDF document text
- https://s3.amazonaws.com/dogevazapiwediw/libojozexamojow.pdfIn PDF document text
- https://s3.amazonaws.com/vufupu/numigolimaduti.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_off0000e068.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE068	2856 bytes
SHA-256: `8a9384bc512513f01e7bbd7e26df3f33c10457497f1237922838d3b841070303`
`font_01_sfnt_off0000ea91.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEA91	5792 bytes
SHA-256: `705a8d4e7da56196b4bc0b73df49328849d9af52c9630ff9f166ef8b3188eccd`
`font_02_sfnt_off0000fe54.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFE54	14000 bytes
SHA-256: `56319825d303272dc711049bc1f275fc52587c4aeea5eabccf3dea43187b19a8`

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