Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0cdf62b6d39c1ba…

MALICIOUS

PDF

96.6 KB Created: 2021-05-10 15:12:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: d29ea7c0f37823525d9fa04a24b8aef0 SHA-1: b13056c0914c7b40b2afd8690efd911c78ed96b9 SHA-256: e0cdf62b6d39c1ba2dd4f9a2c01a3aad9c6f17d654ab05e444366e3ffab81260
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an invoice-themed lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://seumenha.ru/strik?utm_term=how+long+does+post+office+forwarding+last PDF link annotation
    • https://cdn.sqhk.co/rekubapapup/hdPjgif/88955770435.pdfIn PDF document text
    • https://cdn.sqhk.co/remimidotomi/ggEdjet/santorini_deland_delivery.pdfIn PDF document text
    • http://kolekewoni.mywebcommunity.org/75485037640.pdfIn PDF document text
    • http://triple-doska6.club/19473305178qq07k.pdfIn PDF document text
    • http://miromawetibikew.mywebcommunity.org/how_to_set_up_wansview_q5_camera.pdfIn PDF document text
    • http://vutajazelige.medianewsonline.com/adverbs_of_manner_lesson_plan.pdfIn PDF document text
    • http://vinorama.fun/4632664723863cyy.pdfIn PDF document text
    • https://cdn.sqhk.co/fabadipub/hgtazjh/modesto_weather_yesterday.pdfIn PDF document text
    • http://xazowagef.mypressonline.com/active_directory_federation_services_a_complete_guide.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/9d158ef0-da2a-40c5-b8d0-ae05afc13490/vamifopefutasogaz.pdfIn PDF document text
    • http://xamukipadu.myartsonline.com/36593218032.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/258ec0b1-07e7-45dc-a259-572540ec0b8e/nowotabuxoripi.pdfIn PDF document text
    • https://16564176-4c62-44d7-82e3-1dea6b832d73.filesusr.com/ugd/5e57cf_a70ae866c8094acb87666ca659fe0002.pdf?index=trueIn PDF document text
    • https://ffcd7f67-9b43-45c2-8e44-b15cca9583b8.filesusr.com/ugd/48bf55_b7a54e1aa74e4caa99c34b7c31499851.pdf?index=trueIn PDF document text
    • https://cef8af8d-7071-4339-ac50-fc417d371010.filesusr.com/ugd/a89196_6ea56b9e88d640dda80637cfaa617e03.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012bef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BEF 5164 bytes
SHA-256: 40b6a558e5a77d88d80ee929db6d6fc9629873543e2c8923770ed37bf1f605b8
font_01_sfnt_off00013da2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DA2 12304 bytes
SHA-256: 0814e099f2819dd6418013c734eb1ccf2628bf521ceed4e78899341034d3f272
font_02_sfnt_off0001671b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1671B 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

Open this report in the interactive analyzer, or submit your own file for analysis.