Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1c096841a5c5355…

MALICIOUS

PDF

78.8 KB Created: 2021-03-15 10:04:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 4178685b293b0d8c5592180ac36e83a0 SHA-1: ded4be644968b83b93b5ec76a622a35805dacc35 SHA-256: c1c096841a5c5355733ce311466667352874b10809a9813c44bd48a7b523e7e3
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous embedded URLs, many pointing to disposable domains and exhibiting link farm characteristics, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a phishing lure designed to redirect users to malicious sites, likely for further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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.
  • 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://golowaki.ru/wix?keyword=toro+sprinkler+system+manual PDF link annotation
    • http://lorewipa.scienceontheweb.net/5338506064.pdfIn PDF document text
    • http://fixmarker.fun/bitidapulifumenkxn3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369786/normal_603e920f5afe9.pdfIn PDF document text
    • http://stebsmeh.space/jusibusizowujobeberuufhl4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370097/normal_5ff7ebd10eb2f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453551/normal_604340c2359a0.pdfIn PDF document text
    • http://leomannapov.com/best_budget_templates_for_excelepzd0.pdfIn PDF document text
    • http://jewigekavevexi.22web.org/yamaha_mg166cx_price_in_india.pdfIn PDF document text
    • http://xezixaz.getenjoyment.net/rupuzulorixijolegofel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446147/normal_602d44808abbf.pdfIn PDF document text
    • http://kafujaguvo.mygamesonline.org/vatiraleluranitosebo.pdfIn PDF document text
    • http://lojapidabud.mypressonline.com/pokaxobitesibirop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443821/normal_602cda77d3063.pdfIn PDF document text
    • http://nulonelam.66ghz.com/38309674917.pdfIn PDF document text
    • http://uscovidcharts.com/14938235820sdb0.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://vujuvisesakok.myartsonline.com/sewowakemarusi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ed55648-f3d0-46ec-83b5-ba89f9e38465/knot_for_rope_swing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08471cd1-e2e4-4aad-a514-6479a91a5929/lenovo_t430_9_cell_battery_life.pdfIn PDF document text
    • http://tojozojorezew.epizy.com/da_de_la_madre_en_mxico_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77c3e1f0-f8ab-4a93-9256-2afe620df22b/24062065505.pdfIn PDF document text
    • http://farixotipiw.rf.gd/natosudut.pdfIn PDF document text
    • http://baxolorojujore.rf.gd/deritowavebiroxegelelud.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.

FilenameKindSourceSize
font_00_sfnt_off0000ea57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA57 4960 bytes
SHA-256: 45fe1639d49127c8d92dfa77d2e09b294bbe67a85dd18e8afd419ee4ae5a806f
font_01_sfnt_off0000fb1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB1F 10688 bytes
SHA-256: 15c5e2263e420a61f4ed0c9b1e29a414657e5bd068d15cfae2a24822c3bb2958
font_02_sfnt_off00011f6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F6D 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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