Malicious PDF — malware analysis report

Static analysis result for SHA-256 a337b407d2fde97c…

MALICIOUS

PDF

79.4 KB Created: 2021-03-28 08:52:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 998f8fad0a144c28ef73b3415c97a1f3 SHA-1: 28e0e1f7ceacfde6c9f50dc9a481c22d93b2e3f1 SHA-256: a337b407d2fde97c23b1de81464c0b331532e77a6ad5470021ac4203c158a262
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm or redirection scheme to deliver malicious content. The document body, though heavily obfuscated, contains references to 'Drakensang online mage guide' and 'wkhtmltopdf', likely a lure to entice users to click on the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://botokaw.ru/wix?keyword=drakensang+online+mage+guide PDF link annotation
    • http://it50discount.pro/split_rows_into_sheets_exceln5tva.pdfIn PDF document text
    • http://top-odejda.com/brightsign_hd223_user_manual7svwv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426695/normal_604021c0c34d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470387/normal_5fe8fe5417837.pdfIn PDF document text
    • https://cdn.sqhk.co/xelalizogim/e4IGjaT/17072509223.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464734/normal_600221ea23641.pdfIn PDF document text
    • http://hookup157.online/48631522271eh1wx.pdfIn PDF document text
    • https://cdn.sqhk.co/vukupamita/hdifJBX/star_wars_robot_characters_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/noxisoture/aicahgf/duromax_dual_fuel_generator_reviews.pdfIn PDF document text
    • http://wiinorama.space/sinadogubinovijakafifp1cy.pdfIn PDF document text
    • https://cdn.sqhk.co/govamopega/aZHigib/95451003292.pdfIn PDF document text
    • http://subbellassecret.com/retosedobiruzaxujagofvc0wq.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
    • http://zunuwovadete.epizy.com/34010868555.pdfIn PDF document text
    • http://tekusuzuxap.rf.gd/can_i_charge_nimh_batteries_with_any_charger.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4584d23c-d319-41c5-a69a-b66742a8dc9c/luxesitaxato.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2b0e977-4d77-4e78-880c-f9a626020150/mares_puck_pro_computer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d921133-c93c-4672-949d-5e44560c7edc/54797697339.pdfIn PDF document text
    • http://rokalugafujat.rf.gd/77715234399.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98effd08-1e4f-4668-a886-c064e30887da/pejiwovidazakowi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fb0b924-b5db-412d-91f4-90b405767327/radotet.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE57 5012 bytes
SHA-256: b6793b0cbba012874f7cac0e2f5817ed37196e65d023a595fc6db965fe0ba188
font_01_sfnt_off0000ff41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF41 10284 bytes
SHA-256: 967595cffc01a2e2d28d45d0aa3d698f76cb62aebd1827f9d6b4b780c91bf993
font_02_sfnt_off0001228d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1228D 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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