Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b6ea185873513b1…

MALICIOUS

PDF

88.4 KB Created: 2021-03-11 18:49:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 5a8cfcdcb96954205eeaf75ef329dd84 SHA-1: 7bb83b08d186d9ae957b0b19d171426b46e77a82 SHA-256: 7b6ea185873513b18e3cd3409e5e6f0abf260c0db608f313d5b7c7732ef144e2
136 Risk Score

Malware Insights

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

The PDF contains an embedded link that redirects to a URL associated with phishing and malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to trick users into downloading further malware or engaging in phishing activities. No scripts were extracted, but the presence of a malicious redirector URL is a high-confidence indicator of a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://botokaw.ru/123?utm_term=chicken+dance+polka+free PDF link annotation
    • http://blancop.xyz/vivah_full_movie_hd_720p_worldfree4uegaqo.pdfIn PDF document text
    • http://maretexojud.66ghz.com/formal_wear_boutiques_near_me.pdfIn PDF document text
    • https://sefokasezasun.weebly.com/uploads/1/3/4/6/134690402/b46e82c06c6.pdfIn PDF document text
    • http://weraka.online/71380495486sqcc1.pdfIn PDF document text
    • https://rajevolid.weebly.com/uploads/1/3/0/8/130813967/pemibepodobekoze.pdfIn PDF document text
    • http://hs-life.ru/lewed506nm.pdfIn PDF document text
    • http://pobegikobej.iblogger.org/73310620629.pdfIn PDF document text
    • https://xolojafiwonizup.weebly.com/uploads/1/3/5/9/135966724/2579f7f4.pdfIn PDF document text
    • http://halfraire.xyz/honda_africa_twin_dct_owners_manual2j3p0.pdfIn PDF document text
    • http://nikecortez.net/86799807678yz550.pdfIn PDF document text
    • https://xoxaworik.weebly.com/uploads/1/3/4/0/134012931/wapodaxaxoxisa.pdfIn PDF document text
    • https://vewirorerisemi.weebly.com/uploads/1/3/4/6/134627211/baxusexusegekek-sugelilip.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/winumigutam/tululitunapotinojifopa.pdfIn PDF document text
    • https://s3.amazonaws.com/tiduro/sabrina_claudio_full_album.pdfIn PDF document text
    • https://e97408dc-4b05-4e3b-9f19-f4127feb49ef.filesusr.com/ugd/a42eed_eb867cc66e6c4345876d4340eb964a42.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wupuxus/android_offline_rpg_games.pdfIn PDF document text
    • http://nejegidijikoj.epizy.com/thermalito_forebay_fishing_report.pdfIn PDF document text
    • https://6739ca04-605d-4ff4-b4c9-4e5bd75a7819.filesusr.com/ugd/031dda_810d4556a00e4d00b28ee9f317fc8a6d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf5d96b7-dead-4c1d-bad2-d77e9b3e3d55/mutants_and_masterminds_5th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f25cd86f-6333-413e-97e9-052dd26de9b3/how_to_spell_looking.pdfIn PDF document text
    • https://s3.amazonaws.com/gapivegek/zitesusezivuripe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d61f491b-4455-49da-b5a0-fc8756d9d3e7/17127210586.pdfIn PDF document text
    • https://s3.amazonaws.com/vufuzewasi/kewiwurubasuku.pdfIn PDF document text
    • http://zaponabugati.epizy.com/how_to_write_a_gcse_music_essay.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e2b5002-3fc1-4774-85ba-53940d9d92ff/sagafodudo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/844541b6-7b69-40cb-b404-a5fa963542b5/50078032792.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00012871.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x12871 23524 bytes
SHA-256: 310cb367c6a4d5347e87489cd8a8db523ba812b4f2fa9b59a5ab36098232834f
font_00_sfnt_off0000f096.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF096 5036 bytes
SHA-256: 5ff082b7b646e296d107a9b4a41be0c1cd5f651ec46a5b1f5ad3f42326c02c03
font_01_sfnt_off000101b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101B0 11276 bytes
SHA-256: 567dfbf71c139fe2690a5f94a54ab14045805d8443c02691013b4f668efd3b69