PDF malware analysis — malicious · 0e15f2b9a8f1524f

MALICIOUS

PDF

124.3 KB Created: 2021-03-14 10:57:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25

MD5: bfc029a750de8da8a73c68edc79db71c SHA-1: bbe43e50d70179516b7014b2e126d026597bde81 SHA-256: 0e15f2b9a8f1524f312fe9e0571c2a3c57dfef8111f717f2dd69dac952d351e7

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple embedded URLs, with one specifically mentioning 'presentation about myself for job pdf', suggesting a social engineering lure. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of numerous links, including those on disposable hosting, points towards a phishing or malware distribution scheme.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

Heuristics 7

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 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.
Callback phishing phone lure medium SE_CALLBACK_LURE

Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
Fake invoice / payment lure low SE_INVOICE_LURE

Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
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://jacksth.ru/award?keyword=presentation+about+myself+for+job+pdf PDF link annotation
- https://cdn.sqhk.co/zomulusiku/9iaGmhf/gunotezeg.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4377414/normal_600bcfc45bbff.pdfIn PDF document text
- https://cdn.sqhk.co/nasanoroge/jfv95ic/dafemule.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4417675/normal_60098ddc6929c.pdfIn PDF document text
- http://esmoney.site/bivagsbsvn.pdfIn PDF document text
- http://fdvsefwfrw.space/ragabitaviwugilotojcdcwv.pdfIn PDF document text
- http://motarojetox.sportsontheweb.net/brother_ls_1217_extension_table.pdfIn PDF document text
- http://vubitim.sportsontheweb.net/why_pilot_light_wont_stay_lit_on_furnace.pdfIn PDF document text
- http://detonic-italia.website/tomopivasupukuzotetavavik6ji8.pdfIn PDF document text
- http://xsafak.com/all_football_live_appanvfw.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4463264/normal_5ffa0e2025592.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4416927/normal_5ffae768752ee.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/lopadivupudexa/70799694483.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/4c1a1ccc-f0a9-4008-84e2-0186632b989a/how_to_write_a_scientific_summary_report.pdfIn PDF document text
- https://s3.amazonaws.com/fapaga/guidelines_for_food_stamps_in_tn.pdfIn PDF document text
- http://jeborawaleko.atwebpages.com/35531284119.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/59dac235-2576-4f76-8bdd-834b3734db30/11046337828.pdfIn PDF document text
- https://s3.amazonaws.com/rilexazejuzovep/wowezo.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/c938ce37-d50a-4c60-842b-cce69685bacb/79224389781.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
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00019512.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x19512	5504 bytes
SHA-256: `dd8471084fbcba4ee54f0340c45796917aa6e1cf2a7ab99b7623308bdae2e806`
`font_01_sfnt_off0001a7bb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1A7BB	11196 bytes
SHA-256: `7dfdbfdb20df0cbb931ee64634077f2381389b314d767087761fc873b58e580b`
`font_02_sfnt_off0001ce34.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1CE34	16112 bytes
SHA-256: `e9f71365a2a9ea4b152c2f6701d7ccf33f67bf216d443f7f7b47b7c3311bc682`

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