Malicious PDF — malware analysis report

Static analysis result for SHA-256 061821ece45fa394…

MALICIOUS

PDF

77.4 KB Created: 2021-03-25 21:42:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: cc73a75af558b5f77e20b0cefbe3ea85 SHA-1: 35e12ee8b47403f56911ff80b3d5773eb6d300e8 SHA-256: 061821ece45fa3946b384d53296ad0e97c664baef403bb7b6f7efebe66a2469f
126 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm on disposable hosting, with numerous embedded URLs pointing to external sites. The primary URL, https://jacksth.ru/wix?keyword=grim+dawn+shrine+locations+map, suggests a lure to a content farm, likely for phishing or malware distribution. No scripts were extracted, but the PDF structure and URL patterns are consistent with a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://jacksth.ru/wix?keyword=grim+dawn+shrine+locations+map PDF link annotation
    • http://tevaruv.sportsontheweb.net/wings_of_fire_book_review_free_download.pdfIn PDF document text
    • http://jawixogu.mygamesonline.org/16025098304.pdfIn PDF document text
    • https://wanevowak.weebly.com/uploads/1/3/4/4/134465130/1032af0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412900/normal_6001804a78abd.pdfIn PDF document text
    • http://kujinatazema.sportsontheweb.net/how_do_i_pair_my_jlab_headphones_to_my_iphone.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418379/normal_60447446abd7d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501514/normal_5fcb70496c649.pdfIn PDF document text
    • https://talovilivakalod.weebly.com/uploads/1/3/5/3/135326419/bosulik-mowudemuvod.pdfIn PDF document text
    • https://pixasarajesuwov.weebly.com/uploads/1/3/4/6/134688766/bawisenokoso-ralosisewap-kopivexexemon.pdfIn PDF document text
    • http://vowujebotoza.mywebcommunity.org/tubim.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411683/normal_6009592b8d64d.pdfIn PDF document text
    • https://kuvomudoriri.weebly.com/uploads/1/3/1/4/131406544/d903b.pdfIn PDF document text
    • https://dafuzimobolu.weebly.com/uploads/1/3/4/4/134498283/varikonazuj_mokovijeforazig.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403937/normal_5fed470bdb88e.pdfIn PDF document text
    • http://wamabivunufoteg.medianewsonline.com/epidural_anesthesia_in_dogs.pdfIn PDF document text
    • http://rilomenininun.getenjoyment.net/29310753890.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gujimosodaza.myartsonline.com/obstructive_vs_restrictive_lung_disease.pdfIn PDF document text
    • http://lofunadex.myartsonline.com/cessna_208_caravan_pilot_operating_handbook.pdfIn PDF document text
    • https://s3.amazonaws.com/kudufigunabi/why_does_my_hp_printer_keep_say_ink_cartridge_problem.pdfIn PDF document text
    • https://s3.amazonaws.com/lekelepowo/20086196703.pdfIn PDF document text
    • http://vubuzixefixa.onlinewebshop.net/list_of_acids_and_bases_with_formulas.pdfIn PDF document text
    • http://pulutugorivexek.atwebpages.com/project_management_tools_and_techniques_list.pdfIn PDF document text
    • https://s3.amazonaws.com/gosete/what_is_the_earth_atmosphere_composed_mostly_of.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_off0000efff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFFF 5436 bytes
SHA-256: c8379c447271d5b0fa0e1b2cb595cf3edf384ef0af9a554f6c5b105f0ee61434
font_01_sfnt_off00010260.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10260 11192 bytes
SHA-256: 955781f08aa12232dd2a088da258dbe22c492a76ae7f4330ab99f20ec034e8e6

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