Malicious PDF — malware analysis report

Static analysis result for SHA-256 44c6d0798476a96e…

MALICIOUS

PDF

77.5 KB Created: 2021-04-17 21:49:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 0a638f0715dd76e2ea3440fe8cccd07b SHA-1: 2752fb8d1f73da9a581a04115b4d29164c6ef440 SHA-256: 44c6d0798476a96ea37853467ff7a03c387c3232eb2d63a68d0a0cc3957f510a
194 Risk Score

Malware Insights

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

The file is a PDF that contains numerous external links, many of which point to disposable hosting or redirectors. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. The presence of a 'download' button lure further supports this, suggesting the document is designed to trick users into downloading a malicious payload or visiting a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://mezovuduw.ru/strik?utm_term=asda+princess+dolls+house+furniture PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4462708/normal_5fd5f0d185f42.pdfIn PDF document text
    • https://menolalosixoj.weebly.com/uploads/1/3/4/7/134714047/jamuvelebokolov.pdfIn PDF document text
    • https://pedasivu.weebly.com/uploads/1/3/5/3/135387907/7060428.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454435/normal_5fd78d49e5325.pdfIn PDF document text
    • https://repavubujog.weebly.com/uploads/1/3/4/4/134486674/8631160.pdfIn PDF document text
    • https://fidagavatijib.weebly.com/uploads/1/3/1/3/131398583/zedonisi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448103/normal_600ea6bc6d3fa.pdfIn PDF document text
    • https://lemapemoj.weebly.com/uploads/1/3/4/0/134040436/8060115.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388820/normal_603df4f46805b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://68f2566a-c586-4d15-a5d1-3a72044c38f3.filesusr.com/ugd/ecec20_52c0ff37c7f74d5387e527e8d8558613.pdf?index=trueIn PDF document text
    • http://pagujuropiwadiv.rf.gd/xizekajugofurilatitita.pdfIn PDF document text
    • https://933527c5-e005-4225-a3aa-05fee46c7696.filesusr.com/ugd/b51dd5_8df1feb4a18245579ecd538639f9e22f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a1a8ada-3d62-47d8-9369-836f2e6b3645/can_you_taste_chia_seeds_in_smoothies.pdfIn PDF document text
    • http://jusolasoxo.epizy.com/14086064652.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a369e402-22d4-4681-b782-d312b5d994d5/20529870971.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db033335-c0f9-4877-a415-fdd2afedfb1b/how_to_start_craftsman_electric_start_snow_blower.pdfIn PDF document text
    • http://zubixuguse.epizy.com/12950693227.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45ee8288-a02d-41ca-892b-9289de09028c/tecknet_keyboard_not_connecting.pdfIn PDF document text
    • https://6184de0c-c318-42a7-882e-c5ddc63b817d.filesusr.com/ugd/1c8c1e_22e55dd10ca44062adf3900e29446e87.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A0 5232 bytes
SHA-256: 08f5241be9f0da2535099df00f99c7ab40431503719f472f1fb6327863b1b9ae
font_01_sfnt_off00010367.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10367 10980 bytes
SHA-256: 3a020f7a0230be8666b763c17483653ef92971babc6ceea7a04ac0ae3c5b7298