Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d2f05093448b9e3…

MALICIOUS

PDF

78.0 KB Created: 2021-05-19 23:22:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e10acb94d9c94db727d0fa6d983738ab SHA-1: adabc9cf2d78d2d56d3d9f10813ac07492050db8 SHA-256: 1d2f05093448b9e36da454c1ec088572fe3e67fbd06a1394275ac8668d7df2a7
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://mezovuduw.ru/strik?utm_term=all+about+me+worksheet+for+elementary+students+pdf PDF link annotation
    • https://wovupidej.weebly.com/uploads/1/3/4/6/134687137/jaboludatu.pdfIn PDF document text
    • https://jawonuvanez.weebly.com/uploads/1/3/6/0/136021807/bunizese_kurovorazujuza_wimixuxeku_verogenis.pdfIn PDF document text
    • https://jivimukik.weebly.com/uploads/1/3/0/7/130775904/c85a7bf2434703.pdfIn PDF document text
    • https://tepupareta.weebly.com/uploads/1/3/0/8/130814680/6bcc38613.pdfIn PDF document text
    • https://nifirasevaxo.weebly.com/uploads/1/3/4/7/134756957/peligiv.pdfIn PDF document text
    • https://nipetetoxijekuj.weebly.com/uploads/1/3/4/7/134718304/3453140.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494139/normal_602ae002789d6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406806/normal_5ff6226476c57.pdfIn PDF document text
    • https://vewevemeza.weebly.com/uploads/1/3/2/7/132741136/jebaropebowe.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
    • https://uploads.strikinglycdn.com/files/3e2182f3-1fe1-454f-8500-1418a9101f68/58002794789.pdfIn PDF document text
    • https://s3.amazonaws.com/sigobija/universal_studios_japan_travel_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/baxunaf/fokodogutojekavize.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56fd5eab-9baf-4cc3-840b-a0a51155ca36/can_am_spyder_owners_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f2d67b4-d993-4e8a-a1a7-03b3aa1e4273/ford_7.3_diesel_engine_wiring_diagram.pdfIn PDF document text
    • https://s3.amazonaws.com/bejexe/mimijaturinenezalaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3771156a-6dcb-4078-b197-afc1b17af7fc/que_es_propuesta_pedagogica.pdfIn PDF document text
    • https://s3.amazonaws.com/tufitijinexu/bncc_do_ensino_fundamental_em.pdfIn PDF document text
    • https://s3.amazonaws.com/dedinavesute/bear_archery_cruzer_g2_rth_compound_bow_package_stores.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61d709d3-3268-4ea7-a41d-3053f790b3b3/kawenopapagifuwejazavegud.pdfIn PDF document text
    • https://s3.amazonaws.com/zusevamasor/how_long_to_learn_drum_rudiments.pdfIn PDF document text
    • https://s3.amazonaws.com/goviwigax/bloody_roar_4_psp_cso.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_off0000e7c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7C6 5500 bytes
SHA-256: 6b3e32d38da02e0228d08a0f0ffdcaf8528951e021a6905bda08a6580a8afe56
font_01_sfnt_off0000fa67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA67 9916 bytes
SHA-256: 47cc95e9aedb71b9ffdb6373bcf4af3c748ea778af07067e7f6fa5f43bf0f283
font_02_sfnt_off00011c67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C67 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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