Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d9ffffc15b592c8…

MALICIOUS

PDF

80.4 KB Created: 2021-03-20 04:43:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: f7bd127eba94a615a590c24fe3ddcef7 SHA-1: 593aa5e4b9774aad83950ba7a771645e8032f6c0 SHA-256: 6d9ffffc15b592c8624b9f9e4158c4cd719f18e7a12d97376e381be0f5b0991f
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9997

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://seumenha.ru/strik?utm_term=diff+between+gdp+and+national+income PDF link annotation
    • http://familyit.info/alpine_amp_mrv-m500_red_light4bmsp.pdfIn PDF document text
    • http://akvatehnika74.ru/52856425122n4se7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4530429/normal_60485d086c166.pdfIn PDF document text
    • http://greatholl.com/what_happens_in_chapter_14_of_watsons_go_to_birminghamg9eig.pdfIn PDF document text
    • http://vugiris.22web.org/formato_de_certificado_de_preparatoria.pdfIn PDF document text
    • http://kanshoper.site/how_to_day_trade_on_robinhood_with_25k6mdwc.pdfIn PDF document text
    • http://dilawiputonu.mypressonline.com/linking_words_for_ielts.pdfIn PDF document text
    • http://warokibujiz.getenjoyment.net/les_coliformes_totaux_et_fcaux.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403960/normal_6029d6623d80c.pdfIn PDF document text
    • http://rogijowop.sportsontheweb.net/21062352355.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lanelebitomutes.epizy.com/56097230778.pdfIn PDF document text
    • https://e064a861-6c7b-46af-b67a-66be1f32d776.filesusr.com/ugd/ec3e4b_21ca1dedd3a5489c9f61b505a9b1694b.pdf?index=trueIn PDF document text
    • http://batunat.epizy.com/mfj-989c_versa_tuner_v.pdfIn PDF document text
    • http://kexeban.rf.gd/texas_instruments_ti-86_manual.pdfIn PDF document text
    • https://59e5a08b-0d8d-455f-a3a7-35a3b781ab3e.filesusr.com/ugd/784815_e4eca37c3e5b42fc89eb37381c2bfa08.pdf?index=trueIn PDF document text
    • https://bb55feb6-a0c4-48ae-8f72-aea2c45912f8.filesusr.com/ugd/b9801a_a229b6b44b6d4f1aa1ab31b7175c457c.pdf?index=trueIn PDF document text
    • https://8fc1c2d6-49ba-4d63-8b95-0327ef2b1627.filesusr.com/ugd/1849a1_7c42b67d864343e887af2517e03b6b20.pdf?index=trueIn PDF document text
    • http://patuwab.epizy.com/irobot_braava_jet_m6_wi-fi_connected_robot_mop_reviews.pdfIn PDF document text
    • http://tirosonitagaxe.rf.gd/59003305747.pdfIn PDF document text
    • http://titomozuluvexov.epizy.com/dawaju.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC57 5432 bytes
SHA-256: c39915d33901d3b12eedcceb5353ba6d09d2f8f3b9c66ad9877aba3dc42fdbca
font_01_sfnt_off00010edd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EDD 10928 bytes
SHA-256: f9d9b51a24d736dcdadfa2152f170a1c531a4f36a279a56c7d9827cb0f3c1ae9

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