Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f35eddbb2d85e88…

MALICIOUS

PDF

106.0 KB Created: 2021-03-31 20:06:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 4ee67fb8de439aca8e6b7ca2a497476a SHA-1: 1868e0d2d055af09d0a6b49d0acf60adb1e0fd45 SHA-256: 8f35eddbb2d85e884641f3723f75969e8c7f49f89473ce291c960dd36f415c41
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 0.9995

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://jottigo.ru/strik?utm_term=tom+clancy%2527s+jack+ryan+season+2+episode+8+wiki PDF link annotation
    • http://rumafelaneli.mygamesonline.org/zatig.pdfIn PDF document text
    • http://zakugajogaz.iblogger.org/jinidemokowimeduras.pdfIn PDF document text
    • http://xasedogamif.mypressonline.com/bk_application.pdfIn PDF document text
    • http://fovuvizoge.22web.org/mipikonudijomafufet.pdfIn PDF document text
    • https://cdn.sqhk.co/xiwapusumoge/gghazJW/lododugatot.pdfIn PDF document text
    • http://katorewudejizut.22web.org/collective_bargaining_agreement_for_nurses_in_kenya.pdfIn PDF document text
    • http://kufomabid.mywebcommunity.org/mastering_bitcoin_unlocking_digital_cryptocurrencies_free.pdfIn PDF document text
    • https://cdn.sqhk.co/kulobibab/fVilZgc/konitajo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8a5a474a-a671-4857-921d-d1df0ee72544.filesusr.com/ugd/523716_78b3e9642ec149498704a921e040af51.pdf?index=trueIn PDF document text
    • http://rafodize.rf.gd/benedictus_qui_venit.pdfIn PDF document text
    • https://ce3a146a-d504-4efb-981c-4593fb85d965.filesusr.com/ugd/5b5da7_203f7bcff8d044b2878ec4b60738d44d.pdf?index=trueIn PDF document text
    • http://zetesapoxus.epizy.com/nubavuravijototofabof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32e70c8c-6c48-4cba-a8de-81bdb17b72a2/87351112733.pdfIn PDF document text
    • http://gipebevu.atwebpages.com/zuradowi.pdfIn PDF document text
    • https://413f70bc-0247-4a04-a3fc-eabb14e2b93f.filesusr.com/ugd/f18ee6_8aa05b7864ab4c8490ae5b39db5835c6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/24f78094-1ce3-472e-8021-b1cdcf355a84/how_do_you_move_tables_in_google_docs.pdfIn PDF document text
    • https://33b7cf8b-1cb2-46d9-9063-17e97cba5e80.filesusr.com/ugd/9edd50_042fa373278e4b3690820e706923cd5c.pdf?index=trueIn PDF document text
    • http://jonesojawu.myartsonline.com/avalon_hill_jutland_rules.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55f9962b-fe4a-49cb-999b-d51e66eb8989/fitbit_versa_lite_not_updating_on_iphone.pdfIn PDF document text
    • https://8650d040-a33d-467d-a608-6706f181f11b.filesusr.com/ugd/61b8bf_6eefcb33e01f4758bdddf9ff9639c779.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/145f467d-bc58-455a-be77-38a84d56e221/chicken_soup_for_the_teenage_soul_quotes.pdfIn PDF document text
    • http://tagitiwojo.rf.gd/52557986721.pdfIn PDF document text
    • http://bezukovopobav.epizy.com/casio_watch_aq-s810w_instructions.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_off00015d5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D5C 5860 bytes
SHA-256: 6217edb7519b18ae808dabe1c14c4cd3e7d48712c1a23cad9775627fea77d189
font_01_sfnt_off00017164.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17164 13048 bytes
SHA-256: a341242d809ef2115c7096ce519462bff9e55105020b74781021d79bab41ef1e

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