Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1529d09d5dc840b…

MALICIOUS

PDF

70.2 KB Created: 2021-03-18 13:58:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: b1ad5507ea52d956182c31afe8d51d6e SHA-1: 5bb0aa29e8b0eef731190f6d24d44edab4372c97 SHA-256: e1529d09d5dc840b0c65347b5ca5bf4bf9d255563aa97c767ea2e3f592c39e83
186 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious sites. The presence of embedded URLs and the overall structure strongly suggest an attempt to lure users to external content, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://jottigo.ru/strik?utm_term=101+design+methods+pdf+free PDF link annotation
    • https://cdn.sqhk.co/bulixanejad/lx6hfhF/67254992276.pdfIn PDF document text
    • https://cdn.sqhk.co/rirexiwudag/cVg9dii/sozezimererukakatu.pdfIn PDF document text
    • https://cdn.sqhk.co/pipujevi/hdiijjD/4897807682.pdfIn PDF document text
    • http://datingsexchat.site/botany_an_introduction_to_plant_biology_free_downloadny6im.pdfIn PDF document text
    • http://smotrikino.fun/will_there_be_more_miss_peregrine_movieso6my8.pdfIn PDF document text
    • http://harmony-market.ru/what_is_gemstone_meaningac0lx.pdfIn PDF document text
    • http://jumpfs.space/34604042720mq22e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422134/normal_6048139958253.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416326/normal_60438ea02c544.pdfIn PDF document text
    • https://cdn.sqhk.co/deloreba/jjmblic/space_merge_galactic_idle_games_2018.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448547/normal_60464039b723c.pdfIn PDF document text
    • https://cdn.sqhk.co/salozudat/cOHgjge/bleacher_report_nfl_picks_week_one_2019.pdfIn PDF document text
    • http://jasazotinalol.mygamesonline.org/sudoxerizobakerijon.pdfIn PDF document text
    • http://mitutepoka.medianewsonline.com/2005_honda_civic_transmission_replacement_cost.pdfIn PDF document text
    • http://sisogelodaze.medianewsonline.com/beethoven_pathetique_2nd_movement_sheet_music.pdfIn PDF document text
    • http://vilopeg.xyz/nc_controlled_substance_reporting_system2wk0y.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388163/normal_5fd9e0118672e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://536432c6-7160-4795-b32c-faef63afc1c8.filesusr.com/ugd/5e2347_ecd36e213c744264a55f610ce3f3d771.pdf?index=trueIn PDF document text
    • https://ad843f61-c544-48d7-8cfb-3c048b9edb46.filesusr.com/ugd/0dd9ed_092b48ab4d454d9099fc4fc222927539.pdf?index=trueIn PDF document text
    • https://c064424b-11a8-4e39-a524-24a74bcd733d.filesusr.com/ugd/54e393_49f6aea6ae224b88b5e0c97bc2655757.pdf?index=trueIn PDF document text
    • https://5efcf519-4c71-4be9-a00f-e1d47ba804c5.filesusr.com/ugd/ebcc4b_ec7501a63c0343a0bf79a68eee9c5722.pdf?index=trueIn PDF document text
    • http://mifotabelimudon.myartsonline.com/les_misrables_musical_streaming.pdfIn PDF document text
    • https://9073a7de-c49a-43da-a73e-ef18385a730c.filesusr.com/ugd/5899d5_d3d0abb73f6b4180a305a0ffda0d5a94.pdf?index=trueIn PDF document text
    • https://19f621d4-ab03-49b5-bf1d-c78de40104d4.filesusr.com/ugd/bc84a3_b1a8d35e93dc45afa4dce51432541f14.pdf?index=trueIn PDF document text
    • https://0e818273-c791-4c7a-b20f-750474b78fe4.filesusr.com/ugd/362633_6bad991a64b9407c84728ad23b489344.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_off0000d4f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4F7 5312 bytes
SHA-256: b6d73cd9d2c210e6b1a04119a4c6d5ebe62da5b831ed1c4434af648bd5a3a4ae
font_01_sfnt_off0000e6e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6E5 10264 bytes
SHA-256: 1d2b159606d5d9eb47ddfc564537d381b69ccd74e5a0693eecd3685e5d7f0a26

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