Malicious PDF — malware analysis report

Static analysis result for SHA-256 82e238f30238ed74…

MALICIOUS

PDF

86.5 KB Created: 2021-03-20 19:12:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 50a22961f23d9f3dd6e9a3e8989d115e SHA-1: 103b5ef1e0472b59c5676cabaf7ed0cab538af80 SHA-256: 82e238f30238ed744cd564a649a92d752602ac2c05aab7392209dd6d373f389f
186 Risk Score

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. 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 0.9967

Heuristics 6

  • 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.
  • 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://lozipotod.ru/award?keyword=cable+length+voltage+drop+calculation+formula+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379601/normal_5fd7f58a22b7d.pdfIn PDF document text
    • http://mebets.xyz/torebosufag1yexg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376606/normal_6052bf55d8125.pdfIn PDF document text
    • http://lnstagramverifiedsbadgeform.com/cute_dolls_hd_wallpapervjnrf.pdfIn PDF document text
    • http://buzatukati.iblogger.org/bahut_khubsurat_ho_tum_ghazal_song.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408324/normal_604412ea5af90.pdfIn PDF document text
    • http://fozixozag.iblogger.org/graphic_design_portfolio_ideas.pdfIn PDF document text
    • http://goproonly.com/sat_prep_book_ratings9brra.pdfIn PDF document text
    • http://com-signto2.xyz/mugokifupadilekulysc9c.pdfIn PDF document text
    • http://zarabatyivat.ru/lemakigepiwapof10kh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4504788/normal_6010301a0b942.pdfIn PDF document text
    • http://jiludedo.iblogger.org/29752650338.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kevokafi.rf.gd/black_and_decker_cordless_long_reach_hedge_trimmer.pdfIn PDF document text
    • https://d4f1f58f-bd44-402a-a4b0-a3aa01e36dbf.filesusr.com/ugd/dffefa_9e4bc827328a4e6fa1afba856ec24acd.pdf?index=trueIn PDF document text
    • https://72b50e20-f79f-40ca-96b4-24bef83e308f.filesusr.com/ugd/1a1092_30bc0a5caee049e1a85c59f359c7eee6.pdf?index=trueIn PDF document text
    • https://ac3db616-04cb-40f1-8357-c67041f5e20c.filesusr.com/ugd/eda9ba_31336c56cfa64b95a9a1e5b666d0544a.pdf?index=trueIn PDF document text
    • http://ruwevabebivis.epizy.com/14929532564.pdfIn PDF document text
    • https://621cd70f-1aca-46de-91df-1bd8162c3e90.filesusr.com/ugd/9f1ad6_11afcb36d758490a81d493535adda94c.pdf?index=trueIn PDF document text
    • https://2e81f42f-67f9-46a9-89e2-a5f3ab3b03ee.filesusr.com/ugd/f138f5_1c42a22495ea4942a23d52fc303034df.pdf?index=trueIn PDF document text
    • https://7404da97-7fcf-4d5f-9d5f-3f8644e6773a.filesusr.com/ugd/35f767_ef6463541cc04652844353366387d575.pdf?index=trueIn PDF document text
    • https://6c473ef0-402e-45f0-9f95-6bc7e89a6a1a.filesusr.com/ugd/5518c3_6a66c6fc10e64821a5113b438c64e754.pdf?index=trueIn PDF document text
    • http://mafilijesov.epizy.com/2008_ford_escape.pdfIn PDF document text
    • http://senovavokugured.rf.gd/rezaruvumomixukibigesen.pdfIn PDF document text
    • http://nivobilov.epizy.com/zovonegaxelite.pdfIn PDF document text
    • https://e2604e0b-f95a-4acb-b53f-a7db3827b2a1.filesusr.com/ugd/225520_179915ec0dc248f3ab394f3f5a6b2f19.pdf?index=trueIn PDF document text
    • https://6acf0ca1-aa41-4771-8b91-54baff69ee7f.filesusr.com/ugd/7d1dc9_0f369687cd0647c3899cc95aa3825693.pdf?index=trueIn PDF document text
    • http://guxasimedoki.epizy.com/magisterium_vol_3.pdfIn PDF document text
    • https://a4758657-6aaa-4003-b0f6-1957e800abfd.filesusr.com/ugd/70c1f8_5136a68b5f784f8aa1a11203e8d086ee.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_off00010f86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F86 5496 bytes
SHA-256: a8f75e0949f2376f0d39c346e32fb3b37305a7780edc2ffe238be0fa3d5b0f3c
font_01_sfnt_off00012212.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12212 12320 bytes
SHA-256: b615beafe6a7fe0c9a2977913d04f4fa13dfde499f456c20ffc90cf2ae4938eb