PDF malware analysis — malicious · 7ada2556d27d35c2

MALICIOUS

PDF

82.7 KB Created: 2021-03-16 07:56:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07

MD5: bd945fab4a3d9f9707884fa09345f48e SHA-1: 7ac42a6a183d5b8c92f59e33e9b964a78e1fd2f3 SHA-256: 7ada2556d27d35c2f3ab33d6b6ab84b6f5f557244c1c8ceb20da94e6850eba34

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, indicating it functions as a link farm. Heuristics like PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM strongly suggest this malicious intent. While no scripts were explicitly extracted, the presence of numerous external URLs, some hosted on disposable domains, points towards a phishing or SEO spam campaign, likely delivered as a spearphishing attachment.

Machine Learning

Nyx PDF Classifier malicious score 0.9995

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 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://lozipotod.ru/wix?keyword=defensive+end+drills+with+cones PDF link annotation
- https://cdn.sqhk.co/zoluxoni/jaibThb/78521428832.pdfIn PDF document text
- https://xewulowew.weebly.com/uploads/1/3/4/7/134757629/bikizised.pdfIn PDF document text
- http://timecodes.net/59238542595oohy8.pdfIn PDF document text
- https://zapizurur.weebly.com/uploads/1/3/4/9/134900478/15813.pdfIn PDF document text
- http://helplnstagramcontact6088758.com/wurajanusapoxefizinituriwmjias.pdfIn PDF document text
- https://cdn.sqhk.co/gasowifozil/eiaUgiN/monkey_run_game_show.pdfIn PDF document text
- https://cdn.sqhk.co/kitaparek/CifFVhd/93132237415.pdfIn PDF document text
- https://cdn.sqhk.co/zonigita/1hCeidH/into_the_badlands_season_1_episode_guide.pdfIn PDF document text
- https://cdn.sqhk.co/botonerepap/4Ajc4A4/minecraft_furniture_mod_1._7_10_skydaz.pdfIn PDF document text
- https://xezelugewopisaw.weebly.com/uploads/1/3/5/3/135311865/8005389.pdfIn PDF document text
- http://mazers.fun/logitech_formula_vibration_feedbackwuyy2.pdfIn PDF document text
- https://cdn.sqhk.co/wabasenenem/hPgecRQ/wokovi.pdfIn PDF document text
- http://chelobaka.space/list_of_career_options_after_10thxf7kj.pdfIn PDF document text
- https://dafepigog.weebly.com/uploads/1/3/4/6/134605944/kexijutokibexe_vudular_kufaras.pdfIn PDF document text
- http://gdztut.com/64663329034u5kt9.pdfIn PDF document text
- http://help-bluebadgecenter.com/wayne_dalton_garage_door_opener_program_keypadbyw8j.pdfIn PDF document text
- https://cdn.sqhk.co/fenazijeguk/SHGhigi/javeser.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
- https://s3.amazonaws.com/garorowa/tutuapp_apkpure_ios.pdfIn PDF document text
- https://s3.amazonaws.com/pesetufavo/bash_script_indentation_rules.pdfIn PDF document text
- https://s3.amazonaws.com/mupukesunobaga/muridugorotibapimade.pdfIn PDF document text
- https://s3.amazonaws.com/mikibetiv/ganpati_atharvashirsha_in_marathi_lyrics.pdfIn PDF document text
- https://s3.amazonaws.com/zevutebulaworel/how_much_is_the_prime_rib_at_boston_market.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_off0000fb6b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFB6B	4836 bytes
SHA-256: `a90176bc27297022d39f5a1eb45e86dc1826164bc4bef68119bad3d5ba79b00b`
`font_01_sfnt_off00010bea.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10BEA	10416 bytes
SHA-256: `5cb87565d6c562a63fefc21fed81b797319696eb1c59557c605aa95476a6875f`
`font_02_sfnt_off00012f83.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12F83	4324 bytes
SHA-256: `4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3`

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