Malicious PDF — malware analysis report

Static analysis result for SHA-256 c68c00b4cbb3e9ca…

MALICIOUS

PDF

80.8 KB Created: 2021-05-13 14:02:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 0257dcfcd3f1b6d749db2b2dc8154428 SHA-1: ca17dc7a0c629fa559487eda905669eacb7d72df SHA-256: c68c00b4cbb3e9ca13dd0777c92fdb32f206d78296b5df0d77579002dd05bea5
136 Risk Score

Malware Insights

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

The PDF file contains a heuristic indicating it's a phishing lure, specifically using an image to redirect users to a URL. The embedded URL, https://nipisod.ru/strik?utm_term=hp+deskjet+f4280+repair+manual, is identified as a redirector for phishing. ClamAV also detected this file as Pdf.Phishing.Trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://nipisod.ru/strik?utm_term=hp+deskjet+f4280+repair+manual PDF link annotation
    • http://usmileofficial.site/83202331047r62xf.pdfIn PDF document text
    • https://cdn.sqhk.co/videgogaf/DhgPpzi/xfinity_stream_app_on_firestick_september_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/difigobon/jcojchg/football_manager_tiki_taka.pdfIn PDF document text
    • https://cdn.sqhk.co/fidegelotag/hgKNH54/55981170969.pdfIn PDF document text
    • https://cdn.sqhk.co/pivokazi/ihihhhj/97561445657.pdfIn PDF document text
    • http://theplafond.xyz/what_does_it_mean_to_feel_warm_and_fuzzy_insidenqmvg.pdfIn PDF document text
    • http://stakingyfi.com/85390111741s6sfh.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/zonebon/mac_os_el_capitan_bootable_usb.pdfIn PDF document text
    • http://pozifaganepele.epizy.com/libros_para_aprender_a_tocar_guitarra_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/fosawef/blower_s_daughter_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/jesidofefe/wisdom_for_expecting_mothers.pdfIn PDF document text
    • https://s3.amazonaws.com/voxipanovigepiv/bakawupelokom.pdfIn PDF document text
    • https://s3.amazonaws.com/zunewidimem/7360379429.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxalowafokuvo/calculator_photo_lock_app.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/65645027305.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/nixomizivofexejajejotago.pdfIn PDF document text
    • https://s3.amazonaws.com/pidufozu/73552606125.pdfIn PDF document text
    • http://pisironebininuw.rf.gd/glen_elder_lake_ks_fishing_report.pdfIn PDF document text
    • https://s3.amazonaws.com/tazibabebamep/how_much_does_a_computer_engineer_make_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/remeranexe/77948869452.pdfIn PDF document text
    • https://s3.amazonaws.com/nosepevozux/green_smoothie_recipes.pdfIn PDF document text
    • https://s3.amazonaws.com/nazekisigiduz/strength_training_workout_for_runners.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f108.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF108 5616 bytes
SHA-256: 2d9765fcce516d8a68c2601c542b1d5647134e548aea59f8587e702f92dee25a
font_01_sfnt_off0001040c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1040C 10440 bytes
SHA-256: 9b2dbbdf97ff3cded9f301760d54e1e8b3cc93f997acaba8ba9d227ee0c2f0ae
font_02_sfnt_off000127be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127BE 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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