Malicious PDF — malware analysis report

Static analysis result for SHA-256 e23f3f464a31c094…

MALICIOUS

PDF

73.6 KB Created: 2021-04-14 21:58:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 1c56497efac4bade11408ddddb50b3b5 SHA-1: 9829a5f59ff75427671dfa3e7ec21b8a1a1e3ce7 SHA-256: e23f3f464a31c094e3b0f2c5907bfba75b0f2744e221f63ed793e418b9da315a
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9998

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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+steam+vac+spin+scrub+attachment PDF link annotation
    • https://xefafarorul.weebly.com/uploads/1/3/4/6/134698093/3184374.pdfIn PDF document text
    • http://card2card.live/what_happens_in_the_cruel_princedo2bz.pdfIn PDF document text
    • https://zuvigopujipo.weebly.com/uploads/1/3/0/9/130969218/4891584.pdfIn PDF document text
    • http://bigowet.xyz/wuxitorotoriranukor0tzp0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366402/normal_5fda6a10adb0a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481852/normal_601b7e6a7b5da.pdfIn PDF document text
    • https://radasezase.weebly.com/uploads/1/3/4/6/134643415/feligonemiro-xanigorum.pdfIn PDF document text
    • https://cdn.sqhk.co/wezupobuwab/JjjhjJn/drift_car_ride_along_near_me.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365540/normal_5fe26c0d64da7.pdfIn PDF document text
    • http://dezlice.ru/wow_chronicle_volume_1buvan.pdfIn PDF document text
    • https://pegupirorig.weebly.com/uploads/1/3/1/4/131406852/a987f.pdfIn PDF document text
    • http://cmb-accueil.com/wezemumezeecbc8.pdfIn PDF document text
    • https://cdn.sqhk.co/zidexamuwela/UljeuXI/71597055754.pdfIn PDF document text
    • https://cdn.sqhk.co/finulepaf/XjeCYgj/water_glass_music_tik_tok.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449968/normal_605b69f86a944.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c2dbac7f-2075-4dc1-ad03-af0d0352bff2.filesusr.com/ugd/278743_18091b146549435d8cdc93b98aa0514f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bb33872-cb57-43ba-b8c3-62173be5d0f9/how_is_heat_transmitted_in_space.pdfIn PDF document text
    • https://14da0a27-f261-4d4b-8668-3a369f5c966d.filesusr.com/ugd/46429b_23b26e8261034adc937a071aebecd433.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd6fed3a-3fb1-4d67-977c-22bb71de19e2/husqvarna_550_xp_price_canada.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_off0000e1a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1A5 5300 bytes
SHA-256: 212d0d72df5e64b087d6b82edfb8ce638836102b6d39ac176e5d484cea7a1bb6
font_01_sfnt_off0000f37f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF37F 10568 bytes
SHA-256: df852d9629e52c873bb51bbad27294074030ee97fb8cc32e3a72bacd6e85a2fa

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