PDF malware analysis — malicious · 5f9a8dae34e136c7

MALICIOUS

PDF

77.3 KB Created: 2021-03-17 13:49:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20

MD5: a3be4e7eb099128b3935d182560b0b52 SHA-1: e884eaed961fb89ab74236dc7212b732a2070ef0 SHA-256: 5f9a8dae34e136c7fdff725effc4e0bb58d971961cec6bebff559dd3344885a9

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file contains a large number of external links, a technique often used for SEO manipulation or to redirect users to malicious websites. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically classified as a phishing trojan. The embedded links suggest an attempt to drive traffic to potentially compromised or malicious domains.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

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://lozipotod.ru/123?utm_term=calendar+worksheets+year+2 PDF link annotation
- http://rejasikega.scienceontheweb.net/the_boy_in_the_striped_pyjamas_book_buy_online.pdfIn PDF document text
- https://jijaxiwiruba.weebly.com/uploads/1/3/5/3/135333012/1291796.pdfIn PDF document text
- https://madaxujawu.weebly.com/uploads/1/3/5/3/135301267/bawifejuw_tekepowixa.pdfIn PDF document text
- http://bexixibeguben.sportsontheweb.net/46956818675.pdfIn PDF document text
- https://cdn.sqhk.co/sawowudin/Zaigjjd/download_game_bloody_harry_mod_apk.pdfIn PDF document text
- http://fuxezaboxekave.scienceontheweb.net/lekujewugikileto.pdfIn PDF document text
- https://fasadosuz.weebly.com/uploads/1/3/4/0/134012998/c1ca439c66.pdfIn PDF document text
- https://jarofuzaduse.weebly.com/uploads/1/3/4/5/134502270/bevibab.pdfIn PDF document text
- https://mofazutozu.weebly.com/uploads/1/3/4/8/134871383/lozagorapinejivo.pdfIn PDF document text
- https://cdn.sqhk.co/koluvukirate/hcvhh6n/70943170769.pdfIn PDF document text
- https://tixanesel.weebly.com/uploads/1/3/4/2/134234664/lojevo.pdfIn PDF document text
- https://vebovaxuzukikom.weebly.com/uploads/1/3/4/3/134352383/wibowiz_zivadudif.pdfIn PDF document text
- https://tedovuja.weebly.com/uploads/1/3/4/4/134465286/9a1ebc655394e.pdfIn PDF document text
- http://sopesukenapad.scienceontheweb.net/12788416194.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/sowirutelevolur/january_2019_calendar_free_template.pdfIn PDF document text
- https://s3.amazonaws.com/jejulurowev/mcgraw_hill_answers_biology.pdfIn PDF document text
- https://86146b48-cf95-488a-b5a0-22832f4589a6.filesusr.com/ugd/3b4eee_9ab18503a0764042b436b93474c6d16d.pdf?index=trueIn PDF document text
- https://78151a86-a557-4e49-81aa-a2539eea45c7.filesusr.com/ugd/204f4f_af10140fb57c4fb68162d1db822f5054.pdf?index=trueIn PDF document text
- https://a943cdc4-551e-4fd6-8842-bb1c82e441e2.filesusr.com/ugd/a0303e_8d1eb65a2b5a4627b82f779a5aa05485.pdf?index=trueIn PDF document text
- https://2b81f3f0-3f46-42ff-87a7-5865dd96cd3c.filesusr.com/ugd/fb41f9_edf109921dec4e1989f2e672af9f6832.pdf?index=trueIn 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_off0000e3a4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE3A4	5064 bytes
SHA-256: `4375aad916ec98016fe6241106874df95aaff28040cbcde3f2b0a402024867ea`
`font_01_sfnt_off0000f4ed.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF4ED	10708 bytes
SHA-256: `e14510508c98642bf6ec0f4f6cc598b4155c539c90595c58973743327dec342a`
`font_02_sfnt_off0001199d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1199D	4324 bytes
SHA-256: `1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361`

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