Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2f4ee57aebcfd36…

MALICIOUS

PDF

79.2 KB Created: 2021-03-10 17:17:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 9770cb2af2e9331c0c5c50eaa3477130 SHA-1: dc1fc2b863f1ef00caccd12de6be92b34438481c SHA-256: f2f4ee57aebcfd368f136d962bfedd780619a77aa14450c445909b2ee3be68e0
126 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a link farm on disposable hosting, with a high ML classification and ClamAV detection as a phishing trojan. The embedded URL points to a domain that appears to be used for keyword-based redirection, likely to a phishing or malware site. The document body, though heavily obfuscated, contains text related to 'the sisterhood of the traveling pants 2 pdf', suggesting a lure to attract users searching for this content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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 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://soxebez.ru/wix?keyword=the+sisterhood+of+the+traveling+pants+2+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4488815/normal_5ff531caf1070.pdfIn PDF document text
    • http://potawuzaj.medianewsonline.com/cpm_core_connections_course_3_chapter_7_answer_key.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416672/normal_5fffaf1d4b87b.pdfIn PDF document text
    • http://mivarajemaze.22web.org/zugik.pdfIn PDF document text
    • http://xibawolafubiz.getenjoyment.net/harry_potter_book_2_chapter_6_summary.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371783/normal_603f79ff7e9f5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486201/normal_5feccd8312d31.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485442/normal_5fd79eafda2d1.pdfIn PDF document text
    • http://josebixotarez.22web.org/the_course_of_love_alain_de_botton_quotes.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7760391f-c1ef-4fad-b280-e1badcf7cc83/how_much_is_infinix_note_6_in_ghana.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d608277-c11c-4ce6-be95-d8aa35f8f40d/1999_polaris_xplorer_400_4x4_owners_manual.pdfIn PDF document text
    • http://bojedujob.rf.gd/firestop_sealant_3000_datasheet.pdfIn PDF document text
    • http://juludiripo.myartsonline.com/tasaletumumomenedugofa.pdfIn PDF document text
    • https://ef733714-782c-48ea-8991-1bc0bf0c95f2.filesusr.com/ugd/ad2ade_315e8734827d48bbaa6fb24334d9e847.pdf?index=trueIn PDF document text
    • https://cef8af8d-7071-4339-ac50-fc417d371010.filesusr.com/ugd/a89196_bb28129d75f04d10bdfe123a80fbcf91.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/liguwubore/honkai_impact_3_guide_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f722a80-3b6e-438c-8054-ec8d72cce6d4/should_you_watch_chuunibyou_demo_koi_ga_shitai_lite.pdfIn PDF document text
    • https://43cb2d18-1589-43a7-b1c5-fe1278e1c76d.filesusr.com/ugd/370b54_ecd2e7f8ad7f48ba8e7a0d5127c12323.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bokelur/buyer_agency_agreement_form_nc.pdfIn PDF document text
    • https://9a1eab6f-da2d-4a41-99bb-18a59f11b130.filesusr.com/ugd/c2b690_b17da1f190fd4b2391423eb21651a171.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/donarepemi/bangla_video_gane_ing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/deeb6232-abbd-4011-a949-ec5edb3f1e3e/sikeguwemadib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3809fa2a-f041-4adf-82ea-6a6b772d5ca0/autocad_web_app_not_loading.pdfIn PDF document text
    • https://4b3b4da4-1145-40fd-8a04-0ac29766dab0.filesusr.com/ugd/6c6203_2dc44f130370404cbe46bc59ad69ad87.pdf?index=trueIn PDF document text
    • http://poziluxolebulu.epizy.com/20791695390.pdfIn PDF document text
    • http://zugepoguj.onlinewebshop.net/58030536410.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_off0000f708.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF708 5444 bytes
SHA-256: ae3510c5309c99cfa37e5fc0bf65b3f380bcf8183bedab8a303b56d987ace5cd
font_01_sfnt_off00010990.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10990 10812 bytes
SHA-256: 0491d399c85bd4ea99f0cddbd0791718352ca8ae67c719310c1f6fd61b4ea4d2