Malicious PDF — malware analysis report

Static analysis result for SHA-256 d03b4a10df40088a…

MALICIOUS

PDF

135.1 KB Created: 2021-03-08 05:27:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8c847fe8bbaf8ac4c1474e8931a0dd89 SHA-1: 50ad4e8cb5a55922e0ddb0bcf02bfdbbe31e1518 SHA-256: d03b4a10df40088ab2e9e9137576d8016653297b8713ffb8dbd3068565323ff3
156 Risk Score

Malware Insights

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

The PDF contains an embedded URL pointing to 'maypoin.ru', which is flagged as suspicious and likely part of a phishing or malware distribution scheme. ClamAV detection and ML classification strongly indicate malicious intent. The document body, though heavily obfuscated, appears to contain metadata related to its generation, suggesting it's a lure rather than legitimate content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/wix?keyword=the+basic+raw+materials+for+photosynthesis+are+water+and+carbon+dioxide
    • http://diseguj.22web.org/what_does_combining_like_terms_mean.pdf
    • http://xexapitanegis.getenjoyment.net/best_calorie_counter_app_for_homemade_food.pdf
    • http://samitap.iblogger.org/magellan_gps_315_update.pdf
    • http://pugisapi.mypressonline.com/the_raven_analysis_edgar_allan_poe.pdf
    • http://juwupexutaval.mywebcommunity.org/36980842054.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/e0ba7067-f811-430d-8cc4-9f85658e44b1/chick_fil_a_menu_nutrition_honey_roasted_bbq_sauce.pdf
    • https://s3.amazonaws.com/fedojigudaj/tideritufimanijamigiravab.pdf
    • https://eb62986f-0112-409a-9ebe-777412bc5c19.filesusr.com/ugd/26938b_fd0d48c571fb4358b5ba4fe9440c5aeb.pdf?index=true
    • https://s3.amazonaws.com/rimejiguvif/rofexiwuresaxemotavabokef.pdf
    • https://s3.amazonaws.com/wiwuxot/30168182926.pdf
    • https://91953a53-6f32-4f2a-9b2e-0f954541ff31.filesusr.com/ugd/dad90e_8362e35d04014ee09914f7702791eb67.pdf?index=true
    • https://b2d1eea7-aef5-47fc-962c-88b5513ecafc.filesusr.com/ugd/3a57bc_56d9ed5a046046dcbfcf390e8872b76a.pdf?index=true
    • https://uploads.strikinglycdn.com/files/1fc46496-1492-40fe-ae68-346b72c382e8/como_interpretar_una_fotografia_aerea.pdf
    • https://s3.amazonaws.com/jipowumat/febamemipadil.pdf
    • https://s3.amazonaws.com/fedufiporara/jajeralej.pdf
    • https://uploads.strikinglycdn.com/files/ce390d67-6a91-4803-bb8b-787023ea5ac6/luxebavesasoloxosagane.pdf
    • https://uploads.strikinglycdn.com/files/4f3b556a-9242-4dce-aa83-4e9363310c9f/lenovo_t420s_ssd_upgrade.pdf
    • https://s3.amazonaws.com/moduxanakuri/melhor_app_agenda_android_2018.pdf
    • https://uploads.strikinglycdn.com/files/d534114e-fdc2-44c9-9228-b2f6209abed3/53764676168.pdf
    • https://s3.amazonaws.com/jivamubug/wakagulajup.pdf
    • http://rotaduwifomol.rf.gd/ganizavexomive.pdf
    • https://s3.amazonaws.com/runuzitexokol/51382640664.pdf
    • https://76f5a3e5-08d8-4581-9975-6c1b933a1845.filesusr.com/ugd/dbbd16_ebe896e2e76b4d2fa40b458b11bd2bdf.pdf?index=true
    • https://s3.amazonaws.com/wukevirenesu/36820407238.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001d5ae.bin
52a1a1a08140ae8fb0698ed535ee053c00a8b760005aecf06143f820e932396f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1D5AE 5748 bytes
font_01_sfnt_off0001e923.bin
93b04c922851fb7a0d3917b4399d15c46e963e302ee8bd28322b067e7b7553ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1E923 10664 bytes

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