Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc6a6e719bbe46ac…

MALICIOUS

PDF

80.4 KB Created: 2021-03-25 17:51:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: f879577a9502583dc9a77ceaa698e906 SHA-1: 5c2f7f15fe1d4e245041ee3e62321daea5496629 SHA-256: dc6a6e719bbe46ace73bf74a117c3d57596a989024dc17b454ab48613f1c50a5
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains multiple external URLs, with a primary focus on 'https://vilenefex.ru/123?utm_term=79xx+voltage+regulator+datasheet+pdf', suggesting a phishing or malware distribution lure. The document body, though heavily obfuscated, contains references to '79xx voltage regulator datasheet pdf', reinforcing the pretext for the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://vilenefex.ru/123?utm_term=79xx+voltage+regulator+datasheet+pdf PDF link annotation
    • http://domobifotuza.sportsontheweb.net/pefidilugepobozonopu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368768/normal_601e261f32d52.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447460/normal_60210bd80a6bf.pdfIn PDF document text
    • http://xapepinozex.22web.org/asureforce_timesheet_login.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427097/normal_5fd60cbe9b654.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451227/normal_5fd2d4bd7e29f.pdfIn PDF document text
    • http://xakidofe.sportsontheweb.net/zosuvizalubarisamenu.pdfIn PDF document text
    • https://dapodufez.weebly.com/uploads/1/3/3/9/133997146/niwaxedesum_xagobara_kopevofot.pdfIn PDF document text
    • https://lasomuvexovip.weebly.com/uploads/1/3/0/8/130813571/gabusolemiwa.pdfIn PDF document text
    • http://fovoxarofej.getenjoyment.net/wine_enthusiast_18-bottle_dual-zone_wine_refrigerator.pdfIn PDF document text
    • http://gamuxiwami.getenjoyment.net/pharmacology_calculations_practice_questions.pdfIn PDF document text
    • https://juzudibat.weebly.com/uploads/1/3/4/3/134328144/gufidogumikokul.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/484277ab-c144-4589-93e3-ce7fb4325d81/iphone_6_plus_how_to_use_apple_pay.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/855dea62-4bf1-4a86-9f19-9df73f7c2beb/personal_development_objectives_for_work_examples.pdfIn PDF document text
    • http://rapuzivawa.epizy.com/gibag.pdfIn PDF document text
    • https://s3.amazonaws.com/zosevid/5787543266.pdfIn PDF document text
    • http://japixunatavaxi.rf.gd/bedomikujamazadipag.pdfIn PDF document text
    • http://luxupovokajaf.onlinewebshop.net/sarosu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53d68a69-4484-447c-b08b-1ad6b8e0ab37/48410913347.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3fb54b4-7b02-4953-a4dc-7c762a94d0cc/kevalegopuzenuke.pdfIn PDF document text
    • https://s3.amazonaws.com/lomuper/ninja_bike_images_free.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f63d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF63D 5572 bytes
SHA-256: dec1b23bd8986b5fce257ab2bb04ea0fa80b2cac7f596ccffcc222556d02f578
font_01_sfnt_off0001093a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1093A 12736 bytes
SHA-256: bd65f9559de22909efa599680c0f3112ac28a89388b61bf261448f582572c25f

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