Malicious PDF — malware analysis report

Static analysis result for SHA-256 905be75c7a42e67b…

MALICIOUS

PDF

90.2 KB Created: 2021-03-25 05:55:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4833de812a6e0d90f146de5a8aaace99 SHA-1: 2e9c1e9915763397cf8ed817b8cbedc04587401e SHA-256: 905be75c7a42e67b6736c937e19c05b478530dc6385a8ea1daa4b6791b057fa7
176 Risk Score

Malware Insights

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

The sample is a PDF document that uses a lure related to a 'Legionellosis case report form' to trick users into clicking on embedded links. Heuristics indicate this is a high-risk advance-fee scam, and the document contains invisible links pointing to suspicious domains. The ML classifier strongly flags this PDF as malicious, and ClamAV detects it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • 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-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://soxebez.ru/123?utm_term=legionellosis+case+report+form
    • http://migriruy.ru/maytag_5000_series_washer_with_steam_manualsqkt0.pdf
    • http://kefets.xyz/rawobefigujegabiwuylzl6.pdf
    • https://cdn.sqhk.co/veletafi/KhcN0MV/entergy_bill_pay_online.pdf
    • https://cdn.sqhk.co/zivuputid/ghfiija/the_wolf_among_us_bigby_and_snow_romance.pdf
    • http://sabukapu.22web.org/john_deere_185_hydro_transmission_oil_change.pdf
    • https://cdn.sqhk.co/nokotadi/ahezoig/hashtags_for_instagram_growth.pdf
    • http://nicepics.xyz/lazatafinovewarukozobieb61d.pdf
    • http://pakavoposot.22web.org/kalozimojupakipopiwime.pdf
    • https://cdn.sqhk.co/divoxisig/qgcGCih/tuner_g_string_free_ios_13.pdf
    • http://pokemonrivals.online/2001_yamaha_kodiak_400_valuedz6u4.pdf
    • http://loginwithfb.site/buying_a_house_for_dummies_2020gu63h.pdf
    • http://youla-24.cc/ziwomiliwalepovalotouzg.pdf
    • http://xupelomepole.22web.org/hypnosis_is_a_normal_state_of_consciousness.pdf
    • https://cdn.sqhk.co/lugizumevemu/hfihcbT/65049149145.pdf
    • http://sfr-webmail.com/gebemuminitov66rf4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://sexujojo.epizy.com/woxabosuganodip.pdf
    • https://s3.amazonaws.com/vavabi/bodoni_book_italic_font.pdf
    • http://xelepidozagetof.epizy.com/durufumoporeseluwuv.pdf
    • http://vevemaj.rf.gd/52954277100.pdf
    • https://s3.amazonaws.com/tufujifinobiro/depite.pdf
    • https://s3.amazonaws.com/janodojivi/adobe_acrobat_reader_dc_chrome.pdf
    • https://s3.amazonaws.com/jobavo/gelukizetujobovizes.pdf
    • https://s3.amazonaws.com/nodetuxapabara/44907405506.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_off000120da.bin
9367ab1d363ba0762ba715306e7fa5819f1a00b1a45b9c860803990f74a7b293		 pdf-font-stream PDF embedded font (sfnt) at offset 0x120DA 5276 bytes
font_01_sfnt_off000132c7.bin
6c98e40f797a51739e3a9e9b6dfc1d75621545261038ff5257245cce867adff5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x132C7 11980 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.