Malicious PDF — malware analysis report

Static analysis result for SHA-256 eefd352fd1f1f665…

MALICIOUS

PDF

76.9 KB Created: 2021-03-19 08:52:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 8b213b54ecc22cf749a0e62ed26eaa97 SHA-1: 685c7e10abe99dbc7093520b499996b13a9c876e SHA-256: eefd352fd1f1f665627d6dd0837f36e4a9b68086548aa05d39a06f03bd00eac4
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs and is flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan delivery mechanism. The document body, though heavily obfuscated, contains text related to 'Stranger Things' and the authoring application, suggesting a lure to entice users to click on the embedded links. The presence of many distinct hosts and disposable domains further supports a link farm or phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://maypoin.ru/123?utm_term=stranger+things+imdb+parent+guide PDF link annotation
    • http://kakorixow.mygamesonline.org/oxford_university_press_catalogue.pdfIn PDF document text
    • https://fatomomome.weebly.com/uploads/1/3/1/6/131606630/8952099.pdfIn PDF document text
    • http://rejasikega.scienceontheweb.net/16461968037.pdfIn PDF document text
    • http://wozilimesiz.mypressonline.com/pafesa.pdfIn PDF document text
    • http://omerkatanalp.com/how_to_clean_drain_pump_on_ge_top_load_washerfdt5g.pdfIn PDF document text
    • http://vedatolinofiz.iblogger.org/58644353282.pdfIn PDF document text
    • http://xexajume.iblogger.org/neloxobu.pdfIn PDF document text
    • http://lamejix.scienceontheweb.net/16076262558.pdfIn PDF document text
    • http://pewujok.mypressonline.com/what_are_the_congruence_theorems_for_triangles.pdfIn PDF document text
    • https://dunokosira.weebly.com/uploads/1/3/5/3/135349308/xalajopezasuti.pdfIn PDF document text
    • https://fofumizuzel.weebly.com/uploads/1/3/2/7/132740209/kapakawilibuk.pdfIn PDF document text
    • http://xufelaketodo.getenjoyment.net/baby_grinch_reborn_doll_for_sale.pdfIn PDF document text
    • https://zopiwaseka.weebly.com/uploads/1/3/0/9/130969839/4084751.pdfIn PDF document text
    • http://rafale.store/zowafepujme06.pdfIn PDF document text
    • http://tovarzone.ru/147547297089jmxu.pdfIn PDF document text
    • http://rujisuki.mygamesonline.org/ball_bearing_size_chart.pdfIn PDF document text
    • http://sellforce.ru/sibezedkvr4.pdfIn PDF document text
    • http://jujovobima.getenjoyment.net/doxokawegutire.pdfIn PDF document text
    • http://perfectiona.online/holmes_tower_air_purifier_whitef4644.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://latodunakajof.rf.gd/vavazanul.pdfIn PDF document text
    • http://vedelobezab.rf.gd/the_man_in_the_high_castle_trailer_italiano_stagione_1_review.pdfIn PDF document text
    • http://tawenaxogiminax.epizy.com/blackbaud_charitable_giving_report_2019.pdfIn PDF document text
    • http://kuxemozoxabonag.onlinewebshop.net/82359245456.pdfIn PDF document text
    • http://jilerixam.epizy.com/73802551993.pdfIn PDF document text
    • http://lafatakijuton.epizy.com/80952002587.pdfIn PDF document text
    • http://fejukuvazov.rf.gd/bolero_music_sheet.pdfIn PDF document text
    • http://begosene.epizy.com/incident_report_form_daycare.pdfIn PDF document text
    • http://repenebaroregom.rf.gd/create_a_drill_down_report_in_ssrs.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_off0000ee76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE76 5584 bytes
SHA-256: 20accf215de907b7e55589aebb4160045226c9e29ce4b9ce65e9bf8070e4d40b
font_01_sfnt_off0001013a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1013A 10240 bytes
SHA-256: 85c1a1b4fa2b8cc18efd59f92833d4511e2a785237dd3d5c2e168837a464d294

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