Malicious PDF — malware analysis report

Static analysis result for SHA-256 953cd92a6cd82edd…

MALICIOUS

PDF

105.0 KB Created: 2021-04-19 18:16:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: d49e47b442ad1802c92b9a904d72b7ec SHA-1: 9d4e84afc6132672a7ff3649ed3cdb618af5e644 SHA-256: 953cd92a6cd82edd98ece98804fdeb1f51d4e621a81d17383597e21aad2d36fa
266 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file exhibits characteristics of a malicious document, including a high ML classifier score and ClamAV detection as a phishing trojan. It contains a link farm with numerous external URLs, many hosted on disposable domains, suggesting an attempt to distribute malicious content or conduct phishing. The document also employs social engineering lures, such as suggesting the installation of a browser extension or update, and contains language indicative of advance-fee scams.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 8

  • 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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://bologen.ru/strik?utm_term=wordpress+tutorial+pdf+in+tamil PDF link annotation
    • https://fanuterose.weebly.com/uploads/1/3/3/9/133999321/dff20e8f1.pdfIn PDF document text
    • https://cdn.sqhk.co/wiwokosokif/jfnifig/panini_fifa_365_adrenalyn_xl_2020_codes.pdfIn PDF document text
    • https://cdn.sqhk.co/kiribikiv/cijichh/xakanebinalefabili.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477655/normal_6013e4ee4ccd3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417806/normal_605f6be192c82.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491450/normal_60586c447c0bb.pdfIn PDF document text
    • http://sejujijowevazuk.iblogger.org/66411762473.pdfIn PDF document text
    • https://cdn.sqhk.co/ponesigis/Rhfq3YW/dead_man_down_netflix.pdfIn PDF document text
    • http://gazozaxuk.getenjoyment.net/alternator_parts.pdfIn PDF document text
    • https://moxuronanupew.weebly.com/uploads/1/3/4/5/134597487/1300637.pdfIn PDF document text
    • https://cdn.sqhk.co/goberirud/dZSaKic/40545615904.pdfIn PDF document text
    • https://wanesutilujat.weebly.com/uploads/1/3/4/8/134868149/ruvawe.pdfIn PDF document text
    • https://nibevomixosu.weebly.com/uploads/1/3/4/1/134108547/lozotebetupexi-bonav.pdfIn PDF document text
    • https://cdn.sqhk.co/gobejilu/dghhbjg/3946432699.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4528260/normal_6057f5e6aef00.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c06d174a-caca-4ab2-b5a0-4525cd3135d4.filesusr.com/ugd/856cea_a208a7b9b1464960a29296b81abc3276.pdf?index=trueIn PDF document text
    • https://a32e93c2-1aa3-4149-af29-aa5d163ab988.filesusr.com/ugd/40336e_70f05bd01db948f8822e8907f56940ff.pdf?index=trueIn PDF document text
    • http://zumepif.rf.gd/tidubupure.pdfIn PDF document text
    • https://0e818273-c791-4c7a-b20f-750474b78fe4.filesusr.com/ugd/362633_972df6e2320940b6b063fe922e6b5988.pdf?index=trueIn PDF document text
    • http://ratobewiwigu.atwebpages.com/multivariate_t_distribution.pdfIn PDF document text
    • https://58eafb2e-ea74-4523-a1b2-d2e0fe9bfe54.filesusr.com/ugd/466fa0_4427f34806a5417b86d7146e2e1b4c33.pdf?index=trueIn PDF document text
    • https://3c3b6f52-20a2-448a-be11-eec5930c502f.filesusr.com/ugd/0ca786_121de92a3a1d434980fa128afcadf915.pdf?index=trueIn PDF document text
    • http://fariwugakek.rf.gd/62747871550.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_off00015aa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15AA8 5200 bytes
SHA-256: ae6bcb5954b4da9bbc3c4cdb1a6cc764f451a74025ad157d4327dd5045564e39
font_01_sfnt_off00016c52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16C52 12260 bytes
SHA-256: 8189bf626892d4b50581382f4f68771cd65fbce3a2364458b9994d3f28d6d6b2

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