Malicious PDF — malware analysis report

Static analysis result for SHA-256 62d86bf480d50cfa…

MALICIOUS

PDF

89.9 KB Created: 2021-04-18 19:51:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: dbb5f8ba7514bdde7ad2cee9200644e4 SHA-1: ebe596ff34c8654fe0b4e9e7cc57d567a491e457 SHA-256: 62d86bf480d50cfae71c07d8e503dd704976b3be931dd5b152730c724d2a30d3
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains multiple embedded URLs, one of which, 'https://zajinet.ru/strik?utm_term=hoover+windtunnel+2+uh71215+replacement+belt', is directly referenced in the heuristic findings. The document body, though heavily obfuscated, appears to contain product-related text, suggesting a lure to trick users into visiting the malicious URL. No scripts were extracted, but the presence of external URIs and the overall detection profile strongly indicate a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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://zajinet.ru/strik?utm_term=hoover+windtunnel+2+uh71215+replacement+belt PDF link annotation
    • http://rebelliona.online/36059817345uf40l.pdfIn PDF document text
    • http://kolegutoravi.mygamesonline.org/64418382312.pdfIn PDF document text
    • http://jaderulax.22web.org/applied_economics.pdfIn PDF document text
    • http://mrshadow.net/53697381753wx9k4.pdfIn PDF document text
    • http://zajawezexefijuk.22web.org/personal_and_social_capability.pdfIn PDF document text
    • http://sixesijilolun.mywebcommunity.org/52595066925.pdfIn PDF document text
    • http://vasezasu.22web.org/27190303260.pdfIn PDF document text
    • http://firstreadersclub.com/baahubali_2_telugu_songs_malayalamlrnwf.pdfIn PDF document text
    • http://gedatidigog.sportsontheweb.net/puzedoxaxebuxemavetitom.pdfIn PDF document text
    • http://lnstagramoriginal.com/46348526763910lj.pdfIn PDF document text
    • http://nubilofanekib.mygamesonline.org/the_arsonists_play.pdfIn PDF document text
    • http://botanilix.mygamesonline.org/retinopatia_diabetica_articulo.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
    • http://rugefar.myartsonline.com/46151029547.pdfIn PDF document text
    • https://s3.amazonaws.com/dumupa/brake_buddy_classic_3_installation.pdfIn PDF document text
    • https://s3.amazonaws.com/zamuriza/gurepanik.pdfIn PDF document text
    • http://ludugatitabi.atwebpages.com/bertrand_russell_religion_and_science.pdfIn PDF document text
    • https://s3.amazonaws.com/wenobagupexekap/88736829964.pdfIn PDF document text
    • https://s3.amazonaws.com/zazelujeju/what_is_an_image_transfer.pdfIn PDF document text
    • http://nukivamo.myartsonline.com/how_to_fix_a_leaking_refrigerator_ice_maker_water_line.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_off00010d60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D60 5660 bytes
SHA-256: 1aab066aa4884d28ba820d815e55b210ca36ae44090a17926e6d7fb8a404991e
font_01_sfnt_off00012082.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12082 13188 bytes
SHA-256: 7b792a46d339edd47757402888249a2605114fed13b5b9e7da9693fd32278324
font_02_sfnt_off00014bea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BEA 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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