Malicious PDF — malware analysis report

Static analysis result for SHA-256 c977fd8190fe0a16…

MALICIOUS

PDF

91.1 KB Created: 2021-03-28 13:43:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 31edc69f41f82762d8a5567245c60285 SHA-1: 96585d0c29ec4a06b913dc3defc8d0461254acc5 SHA-256: c977fd8190fe0a16298ffb50ab3351cd03c827b906f12ce5e3854cfcf7ab4c26
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier strongly indicate maliciousness, specifically as a phishing trojan. The embedded URLs are likely used to redirect users to malicious sites, potentially for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 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.
  • 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://jumiwimov.ru/strik?utm_term=best+electric+sewing+machine PDF link annotation
    • http://noxopadorilu.iblogger.org/fumixub.pdfIn PDF document text
    • http://xurufotuzu.iblogger.org/siwimimukebefijo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411709/normal_601f52ca63869.pdfIn PDF document text
    • http://nosaraxes.22web.org/89433062878.pdfIn PDF document text
    • https://bijejumutitin.weebly.com/uploads/1/3/1/4/131454352/5332169.pdfIn PDF document text
    • https://mowazaxof.weebly.com/uploads/1/3/4/7/134704653/kezitifazomexidud.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453342/normal_5fed2bcc772fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426418/normal_60138745c4e9b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390641/normal_603c42d23deea.pdfIn PDF document text
    • https://nedosadowizo.weebly.com/uploads/1/3/5/3/135347652/ratil_muwetizagisumub_dotepa_vupanerape.pdfIn PDF document text
    • http://panivupod.22web.org/nazafakevobuzan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454287/normal_6058e6278926e.pdfIn PDF document text
    • https://luxufaxunixepu.weebly.com/uploads/1/3/4/5/134584211/jakabeboxu.pdfIn PDF document text
    • http://kugitipozad.22web.org/airfoillabs_king_air_350_manual.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1e16da7b-5b4f-4122-a3c4-5c88c9d97cf7.filesusr.com/ugd/83f04e_8217a1ca0cba4ec68fb09187119b9b98.pdf?index=trueIn PDF document text
    • https://f8d4b294-f952-4a11-85e8-0a3036f9bdaf.filesusr.com/ugd/ad8f3a_bc761fa2d408404d9f0a7953df417b58.pdf?index=trueIn PDF document text
    • http://gezogiz.epizy.com/ravexolowida.pdfIn PDF document text
    • https://71b4061d-0fbe-47a8-a671-08758978b022.filesusr.com/ugd/0216f2_9893b6c945a046899d1ab98e86ee399d.pdf?index=trueIn PDF document text
    • https://b1b0174c-961c-4936-87f6-765e1132391e.filesusr.com/ugd/6cf804_66b1bfe4b1404678be6d8629afff6c45.pdf?index=trueIn PDF document text
    • https://85ed388a-52e0-4e79-9737-9d4b769dda71.filesusr.com/ugd/bb10c5_7dc0e4eafcbf469ab49ec289c856e7e3.pdf?index=trueIn PDF document text
    • http://voxinuxo.epizy.com/photo_editing_background_image.pdfIn PDF document text
    • https://62e0a885-00c6-4707-8a44-0aeb57389280.filesusr.com/ugd/99b222_e44c1f6236ed459ba4ff70ef8c0bd11f.pdf?index=trueIn PDF document text
    • http://wuluveviwibe.epizy.com/which_book_is_better_tom_sawyer_or_huckleberry_finn.pdfIn PDF document text
    • https://1e438cd7-6f3b-42ac-a97b-d13a75fa135b.filesusr.com/ugd/0c268c_957d40d243ca44509d4809ad0ec5f83c.pdf?index=trueIn PDF document text
    • https://bbaef297-c986-4b42-acb3-0fd65605e280.filesusr.com/ugd/e9fc71_e795d45a3f39473b8d8e2636ac1a77c5.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_off000126bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126BD 5352 bytes
SHA-256: 54d55305ea7ba599ed703dab3c8f323653b1af784c609189ad5a8e468b178fb9
font_01_sfnt_off000138db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138DB 11176 bytes
SHA-256: 2983b1b4f8b20361f86e86149c96a65900d8514b50103c18e09f7a5d90a0c61f

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