PDF malware analysis — malicious · f24eb090058a6729

MALICIOUS

PDF

77.9 KB Created: 2021-06-09 03:02:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25

MD5: 1ed0ac7744adac08571610f95bd40f25 SHA-1: 3da6f4589a8e29ea67b057ad37e65247983e8e82 SHA-256: f24eb090058a6729ce2e2eab2ea08e303e9fb16d0ada2ab2c51ae66bb8e23c3f

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.007 JavaScript

The PDF file was flagged by multiple heuristics as malicious, including ML classification and ClamAV detection, specifically identifying it as a phishing attempt impersonating Amazon. The embedded link and document body suggest a lure for downloading a PUBG mod, which redirects to a disposable hosting service. This indicates a likely credential phishing or malware distribution scheme.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

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
Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH

Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://kajizifobizixa.weebly.com/uploads/1/3/3/9/133997117/mefinipu_zelot_jawulujeguxu.pdf.
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://archism.ru/pbw?utm_term=download+pubg+mod+unlimited+uc PDF link annotation
- https://kajizifobizixa.weebly.com/uploads/1/3/3/9/133997117/mefinipu_zelot_jawulujeguxu.pdfIn PDF document text
- https://nipifofopofeduv.weebly.com/uploads/1/3/4/3/134338269/xibupukiga-lumus.pdfIn PDF document text
- https://zivozisexime.weebly.com/uploads/1/3/2/8/132814465/jazivivu.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4377697/normal_5fef7ed7743d5.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4374013/normal_5fe58db7359f3.pdfIn PDF document text
- https://suguvojonejufo.weebly.com/uploads/1/3/4/5/134585364/fa6ccf7d3d79d2.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4465930/normal_605a7ab3d154c.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4446017/normal_60496c0ce41a5.pdfIn PDF document text
- https://joxenunufob.weebly.com/uploads/1/3/1/6/131606789/2092796.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4493195/normal_6046e0bdeb76c.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://uploads.strikinglycdn.com/files/4ecb8a14-956a-4058-9916-9ed2e3a7cdee/dewalt_drill_bit_set_amazon.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/e76f10ae-2e0f-4d71-bfa8-6b052356c026/libro_la_culpa_es_de_la_vaca_3_gratis.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/618b2d52-005c-4e9b-a5e5-5383d9b6c834/30004569295.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/c7786578-d070-43e1-892f-bf457169c88a/canon_vixia_hf_r82_camcorder_black.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/b2f938db-ab64-428a-9eb5-38bbd25bebb1/how_long_to_see_results_from_weight_training_female.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/24194e00-c88b-4cb9-862f-326af737e366/inorganic_chemistry_housecroft_4th_edition.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_off0000e500.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE500	5232 bytes
SHA-256: `8fff501b9cc571961beaf9fcf80ed15c6d66b20a475078806b96542271aeea57`
`font_01_sfnt_off0000f6c4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF6C4	11140 bytes
SHA-256: `8a8b37b038638c397c3607b26bc651bc5e24ebfaf6129e7694f7f5ca02c9ccee`
`font_02_sfnt_off00011cd9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11CD9	4324 bytes
SHA-256: `1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361`

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