PDF malware analysis — malicious · 2d469275e2352917

MALICIOUS

PDF

72.7 KB Created: 2021-03-12 10:03:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30

MD5: 28bcfb024f665f1f9e2adea621f7575b SHA-1: c5dbc3f1d2aa6756cc9eda75962858bed45e68ed SHA-256: 2d469275e23529176bbad0bced6aa0a8243cd71a49972d14f7d4a3ba66474da3

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to disposable hosting and link farms, suggesting a phishing or malware distribution scheme. The document body, though heavily obfuscated, indicates a lure related to file conversion software, likely to trick users into downloading a secondary payload.

Machine Learning

Nyx PDF Classifier malicious score 0.9991

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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://botokaw.ru/award?keyword=converter+pdf+to+autocad+free+software+download PDF link annotation
- https://cdn.sqhk.co/ragejeli/he3HaCr/best_friends_forever_game_review.pdfIn PDF document text
- http://mbfsopg.com/is_the_roomba_s9_worth_itnrkpc.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4451565/normal_602963e2dcb53.pdfIn PDF document text
- https://cdn.sqhk.co/xekutenupi/jca3pUV/80623649788.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4386824/normal_6042ea5856f9b.pdfIn PDF document text
- http://wow50.pro/12034888101ykr7k.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4368978/normal_601708860c761.pdfIn PDF document text
- https://cdn.sqhk.co/niramojiga/iiEibgd/25477421274.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4424330/normal_601f00e029859.pdfIn PDF document text
- http://lesantyqas.online/examples_of_satire_in_animal_farm_chapter_1tp0do.pdfIn PDF document text
- https://cdn.sqhk.co/popaxutu/jgpJAgg/super_placar_todos_os_jogos_de_hoje.pdfIn PDF document text
- http://hargotel.xyz/lebebunilixarubevekokiga62xj.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4452852/normal_602f60ceb0ef2.pdfIn PDF document text
- http://qrastenmap.online/610_long_tractor_parts_manual6kegy.pdfIn PDF document text
- http://vvinorama.fun/2002_pt_cruiser_shifting_problemspf1e7.pdfIn PDF document text
- http://mybiol.site/kindle_instructions_ukme1ur.pdfIn PDF document text
- https://cdn.sqhk.co/sitopizol/hauF2hd/word_boss_a_crossword_games_like.pdfIn PDF document text
- http://retys.space/cisco_dpc3008_link_light_blinkingit5m2.pdfIn PDF document text
- https://cdn.sqhk.co/lajawawinu/Pfygeig/call_me_emperor_savvy_scroll.pdfIn PDF document text
- https://cdn.sqhk.co/jujejorule/gjGhbii/ecology_center_near_me.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4459792/normal_60134dacbc743.pdfIn PDF document text
- https://cdn.sqhk.co/jaxabofapuw/dgeyNf6/voice_assistant_always_listening.pdfIn PDF document text
- https://cdn.sqhk.co/dugixikisim/jghhaic/digestion_plus_arbonne_instructions.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://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_off0000d2da.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD2DA	5160 bytes
SHA-256: `d3ba4ecf72750044b979a3bf448536def738647b9516c09a1ba2605df01991b6`
`font_01_sfnt_off0000e488.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE488	10024 bytes
SHA-256: `0561a1c6623e9f63e5a022df4f9225dd6af51a15ea408d29036baf8f11bb918d`
`font_02_sfnt_off000106ee.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x106EE	4324 bytes
SHA-256: `a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f`

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