Malicious PDF — malware analysis report

Static analysis result for SHA-256 d44e5004f0fa3e12…

MALICIOUS

PDF

84.4 KB Created: 2021-03-17 07:44:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: f933738815a2316f52c4d9f8691a0205 SHA-1: df657aeeb603dcf5bc60ad0865df95bc5ff9162e SHA-256: d44e5004f0fa3e12b5262735c6f8d97ee7b035b5c33695890df87d96941f99d4
136 Risk Score

Malware Insights

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

The PDF contains heuristics indicating it's a phishing lure, specifically using an SEO redirector to disguise the malicious intent. The ML classifier and ClamAV detection strongly suggest maliciousness. While no scripts were directly extracted, the PDF structure and embedded URLs point towards a phishing attack designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • 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://druttle.ru/wix?keyword=2011+charger+rt+manual+transmission PDF link annotation
    • http://save50.pro/ledevura5wfnz.pdfIn PDF document text
    • http://20970907.net/dukuxiroxewakftiox.pdfIn PDF document text
    • http://femalawiterig.iblogger.org/how_to_update_your_mailing_address_with_usps.pdfIn PDF document text
    • http://jerunuju.mypressonline.com/how_long_can_i_finance_a_skid_steer.pdfIn PDF document text
    • http://vovality.club/mujopetiqo8rx.pdfIn PDF document text
    • http://jenupekob.iblogger.org/google_account_manager_apk_5._1._17.pdfIn PDF document text
    • http://formblckr1.xyz/482012726928lr8f.pdfIn PDF document text
    • http://xakidofe.sportsontheweb.net/can_you_get_big_biceps_without_weights.pdfIn PDF document text
    • http://nanupigib.22web.org/pefebukekevunavo.pdfIn PDF document text
    • http://wonozudobitisog.scienceontheweb.net/78548985105.pdfIn PDF document text
    • http://soxiwokix.iblogger.org/beaver_lake_fishing_report_wa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/how_to_unclog_badger_garbage_disposal.pdfIn PDF document text
    • https://s3.amazonaws.com/juvosi/24835656506.pdfIn PDF document text
    • https://s3.amazonaws.com/bipepezuwed/65106495593.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/whats_the_best_online_guitar_lessons.pdfIn PDF document text
    • https://s3.amazonaws.com/bupesejirijejus/sixth_sense_movie_720p.pdfIn PDF document text
    • https://s3.amazonaws.com/desekusoxi/69544875060.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/walodo.pdfIn PDF document text
    • https://s3.amazonaws.com/nazekisigiduz/guripolosawus.pdfIn PDF document text
    • https://s3.amazonaws.com/makumapikeze/truman_lake_bucksaw_fishing_report.pdfIn PDF document text
    • https://s3.amazonaws.com/mekonulegipero/bookkeeping_spreadsheet_using_microsoft_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/dutuzanob/82901083059.pdfIn PDF document text
    • http://ruvesigokusi.epizy.com/simubomomugexadoz.pdfIn PDF document text
    • https://s3.amazonaws.com/bupaxomu/avengers_hydra_dash_apk.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4B0 5444 bytes
SHA-256: 3047b3af09355bafc1bde7b4a067c626918ec1c3119f48ee65c32f0f1116b564
font_01_sfnt_off0001070e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1070E 11728 bytes
SHA-256: 4ed64480ca6bc82a83937dc1f1acb64715f599d15afce0819a6d555be600724b
font_02_sfnt_off00012f24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F24 16060 bytes
SHA-256: 713933360072c9d59346590fad668f98c3603c6d2b72ed941ce85481f6af0b74

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