Malicious PDF — malware analysis report

Static analysis result for SHA-256 07102765e2e1f362…

MALICIOUS

PDF

103.9 KB Created: 2021-03-20 09:10:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 7124919f109a430f90ddd7cb1a4659d1 SHA-1: 8ccd5e1bb53bd861d3f3db41c3854a40b2088eaa SHA-256: 07102765e2e1f362142156a8f8a8cb903f915f3de84f25a3a23e14dc0d1a2ea8
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 0.9989

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://maypoin.ru/award?keyword=polysynthetic+language+pdf PDF link annotation
    • https://sojozukajarab.weebly.com/uploads/1/3/4/2/134265810/kaxuro.pdfIn PDF document text
    • http://sefadalok.iblogger.org/butib.pdfIn PDF document text
    • http://vesasopivizixak.iblogger.org/the_saxon_stories_books.pdfIn PDF document text
    • https://bakadowo.weebly.com/uploads/1/3/1/3/131380427/1905134.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413016/normal_5fea3fc750237.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489983/normal_60245de82377f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413008/normal_602438a964816.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/gidibesuxi/31676644803.pdfIn PDF document text
    • http://wekapalipewux.epizy.com/kikovatube.pdfIn PDF document text
    • https://s3.amazonaws.com/xeroguru/chrome_windows_offline.pdfIn PDF document text
    • https://s3.amazonaws.com/vovuzize/bodyweight_training_plan.pdfIn PDF document text
    • http://jexoxitisujoj.rf.gd/24109220037.pdfIn PDF document text
    • https://s3.amazonaws.com/pululusodogi/65871749580.pdfIn PDF document text
    • https://s3.amazonaws.com/wewiro/dimufa.pdfIn PDF document text
    • https://s3.amazonaws.com/zukogi/kitanuzago.pdfIn PDF document text
    • https://s3.amazonaws.com/vesubodufisi/longman_dictionary_offline_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/rodakarugupoko/disney_movie_safety_ray_mcelrathbey.pdfIn PDF document text
    • https://s3.amazonaws.com/gonasidupij/advanced_magick_for_beginners_download.pdfIn PDF document text
    • https://s3.amazonaws.com/dikobepibelun/change_app_store_location.pdfIn PDF document text
    • http://tibepaxun.rf.gd/sports_listings_tv_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzamada/sinigudatujojifuxub.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_off00013ebd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EBD 6376 bytes
SHA-256: 2f0c84496eb434c8eb49b1d7523fa123614e2825d0478fcda4ce154dfb2a9cc3
font_01_sfnt_off0001547a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1547A 5424 bytes
SHA-256: 6508aff40bca5819e5b57a21c5f780ae545b04ef9791272b651576ca8d27c20d
font_02_sfnt_off000166fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x166FD 13328 bytes
SHA-256: df35f25de544b7e59419629529cf87093e49904a660f6ebbb0cec26f65fa2a22

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