Malicious PDF — malware analysis report

Static analysis result for SHA-256 1eed85ad370b2db6…

MALICIOUS

PDF

80.6 KB Created: 2021-05-02 02:57:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: ef8f9792597961551110bc0a4c89c46d SHA-1: 292dce48e624801457d6852b93ab7ccfd43bef5f SHA-256: 1eed85ad370b2db603de7876c241bd7419b5f209748b7868729cd19ec6e91cb4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a large number of external links, identified as a PDF link farm, which is a common technique for distributing malicious content or conducting phishing attacks. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://dugedepap.ru/strik?utm_term=how+much+is+a+jeep+wrangler+lift PDF link annotation
    • http://fonudesuwobulud.mygamesonline.org/hk_dass_mathematical_physics_book.pdfIn PDF document text
    • https://zawuziwoju.weebly.com/uploads/1/3/1/6/131636930/100f43.pdfIn PDF document text
    • http://talajifit.mywebcommunity.org/de_finibus_bonorum_et_malorum_english.pdfIn PDF document text
    • http://rorogudadusosej.getenjoyment.net/musagesopewe.pdfIn PDF document text
    • https://kowirakixodoxe.weebly.com/uploads/1/3/4/4/134467502/lipilutekezeluzo.pdfIn PDF document text
    • https://gokixojegesefa.weebly.com/uploads/1/3/4/8/134864476/fuvosogoda.pdfIn PDF document text
    • https://sidusumidiwef.weebly.com/uploads/1/3/4/3/134366372/8787442.pdfIn PDF document text
    • http://komaxinatobofe.medianewsonline.com/beethoven_sonata_19.pdfIn PDF document text
    • http://warowusavi.mywebcommunity.org/7589957168.pdfIn PDF document text
    • https://finikepimu.weebly.com/uploads/1/3/4/0/134017618/6466d010b4f450d.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/rurovikejigibu/50539507289.pdfIn PDF document text
    • https://s3.amazonaws.com/xutomoxu/icao_annex_17_10th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/sivanira/wejekuwof.pdfIn PDF document text
    • https://s3.amazonaws.com/libosokune/circuit_training_limits_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/tomaxade/pacman_30th_anniversary_game.pdfIn PDF document text
    • https://s3.amazonaws.com/ponivotigegepub/kingkiller_chronicles_book_3_doors_of_stone.pdfIn PDF document text
    • https://s3.amazonaws.com/timituvupame/95056872416.pdfIn PDF document text
    • https://s3.amazonaws.com/tobaziw/61580947715.pdfIn PDF document text
    • https://s3.amazonaws.com/kefodek/arrest_reports_lenoir_nc.pdfIn PDF document text
    • http://xologikaju.atwebpages.com/lisd_school_calendar_lubbock.pdfIn PDF document text
    • https://s3.amazonaws.com/rufonali/47985830951.pdfIn PDF document text
    • http://jinugiwi.atwebpages.com/psychology_dictionary_download.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB4A 5560 bytes
SHA-256: ae54198f8e0b1d2197da320d8eaeac3a66530ad413a21770d40584b0fb733994
font_01_sfnt_off00010e23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E23 11432 bytes
SHA-256: ef4c616f7f45f4f88588122c5ddedac5329d82808493af5fbdf8cebaff3c851a

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