Malicious PDF — malware analysis report

Static analysis result for SHA-256 018cd326ac7028e9…

MALICIOUS

PDF

77.1 KB Created: 2021-03-17 04:01:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 2c64048a910b9d0dc43042b10ac39025 SHA-1: cedb0ca2e542a2e2b8cf9d3b6dffa00b14892a0e SHA-256: 018cd326ac7028e9ff6b05bfd931c761d91f645d629b45d17bceaf58cadd342f
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was identified as malicious by ClamAV and an ML classifier, and contains numerous external links. The heuristic 'PDF_SEO_LINK_FARM' indicates a link farm structure, with many links pointing to disposable hosting. The primary external URL found is 'https://seumenha.ru/wix?keyword=planes+of+the+face+for+artists', suggesting a lure to a site that may host further malicious content or phishing pages. No scripts were extracted, but the overall structure points to a phishing or SEO manipulation attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://seumenha.ru/wix?keyword=planes+of+the+face+for+artists PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4496824/normal_5ffc1b4316029.pdfIn PDF document text
    • https://cdn.sqhk.co/gorokipo/jiggejj/led_rgb_remote_pro.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485176/normal_60233cf7b108b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464314/normal_5fe5628e90b20.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465905/normal_5fe319eab14bc.pdfIn PDF document text
    • https://cdn.sqhk.co/lunajevon/Qhaignf/cosy_home_bed_sheets.pdfIn PDF document text
    • https://figurera.weebly.com/uploads/1/3/4/4/134437403/bd8d9d9b2.pdfIn PDF document text
    • http://tixaman.scienceontheweb.net/73515530555.pdfIn PDF document text
    • https://cdn.sqhk.co/rekosiseweno/SgdV7dX/29019616156.pdfIn PDF document text
    • https://fejoburu.weebly.com/uploads/1/3/0/8/130813906/64b701c25291.pdfIn PDF document text
    • https://cdn.sqhk.co/xoraxuvonaf/ijZpTij/47746394927.pdfIn PDF document text
    • http://lalikexitaxixix.getenjoyment.net/how_to_adjust_car_headlights.pdfIn PDF document text
    • https://gapidekejoz.weebly.com/uploads/1/3/4/8/134876705/donob_poxoju_mopubufipilira.pdfIn PDF document text
    • https://cdn.sqhk.co/norowitidot/xKheMhe/dragon_wallpaper_hd_for_laptop.pdfIn PDF document text
    • https://garugufalavul.weebly.com/uploads/1/3/4/5/134507034/231fc9d8435094f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://083189c9-8220-4687-a375-57be19a37228.filesusr.com/ugd/909b15_af522145b2184cc2aaac86c00df6bf17.pdf?index=trueIn PDF document text
    • https://97783159-ced7-426e-9fbd-60d2bb3342fb.filesusr.com/ugd/00058f_a4407baa64af434b952d39473b901f69.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mesixadelomomo/oahu_surf_report_surfline.pdfIn PDF document text
    • https://s3.amazonaws.com/xetasif/76549897248.pdfIn PDF document text
    • http://totuxivez.onlinewebshop.net/bio_data_format_file.pdfIn PDF document text
    • https://d86ad34a-7df2-4f47-937b-a12ab5abc0fa.filesusr.com/ugd/8cbfce_33e1f73d1b384cda86e0d20449a4a5e9.pdf?index=trueIn PDF document text
    • https://27a83426-c768-4525-a63d-b5b732cca755.filesusr.com/ugd/28b3f7_3fcfc7f70c7b48728795e23145198355.pdf?index=trueIn PDF document text
    • https://c9107794-7b31-4e5c-84de-5db174abdfaa.filesusr.com/ugd/aabf5f_dd4ce3cab0374f7a9edadfdddbf3bcb3.pdf?index=trueIn PDF document text
    • http://xazopufegi.onlinewebshop.net/aptitude_examples.pdfIn PDF document text
    • http://pekamidakoj.atwebpages.com/numbers_1_to_1000_chart.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_off0000f180.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF180 4968 bytes
SHA-256: 086a6b23699b3d5daabb569ddc5d47d53689cd5faa4ba02934287217998d17e2
font_01_sfnt_off00010261.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10261 10548 bytes
SHA-256: cb081801b2b550e4cb924260e6bfe051f77435b6b96ddfed884c49dc33deb182

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