Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb2c3b13da95bfc8…

MALICIOUS

PDF

78.6 KB Created: 2021-05-03 19:52:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 596a87982bfab7d0a89c976e6f6770e1 SHA-1: 43369df13817eb6b636c538f31e69746e36cad21 SHA-256: eb2c3b13da95bfc81542582ed6ff028665a405e088fad5e3ebc1c280a4443645
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are to potentially malicious domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external URIs point towards a phishing or malware distribution vector.

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 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://druttle.ru/strik?utm_term=schumacher+sc1359+15+amp+6v%252F12v+fully+automatic+battery+charger PDF link annotation
    • http://sportplays.ru/12878490069leo3d.pdfIn PDF document text
    • http://fomoregekamikat.mypressonline.com/79799164892.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414358/normal_5fdebca00bd08.pdfIn PDF document text
    • http://cenderaoriginator.com/95106162218b620i.pdfIn PDF document text
    • http://legendarycraft.ru/mixepojofeyft.pdfIn PDF document text
    • http://iuts.space/kugakesujajixasamulixesuxhlkgn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376602/normal_6059f7413ab6d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463551/normal_606053e680ee3.pdfIn PDF document text
    • http://zumewidife.mygamesonline.org/christmas_carol_book_download.pdfIn PDF document text
    • http://witikotuxigere.scienceontheweb.net/bluejacking_documentation_format.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459623/normal_603a7e74ae378.pdfIn PDF document text
    • http://zelumefepa.sportsontheweb.net/english_alphabet_cursive_writing.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392453/normal_5fe032b91e303.pdfIn PDF document text
    • http://gsmall.space/linovivezoledevivebeaoaaz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://321e46d8-a3e9-4523-905f-b0dcd1dcb7ef.filesusr.com/ugd/29fbc3_80eca821021a44c6bebf59f5faafd275.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wizuluworafid/good_animation_apps_for_pc_free.pdfIn PDF document text
    • https://s3.amazonaws.com/sowirutelevolur/a_first_course_in_differential_equations_fifth_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/ver_los_juegos_del_hambre_3_parte_1_online_latino.pdfIn PDF document text
    • https://s3.amazonaws.com/jixeremipet/how_did_the_industrial_revolution_affect_both_the_style_and_subject_matter_of_art.pdfIn PDF document text
    • https://s3.amazonaws.com/gosete/nurekavatobij.pdfIn PDF document text
    • https://s3.amazonaws.com/lunojol/motorola_mc40_hard_reset.pdfIn PDF document text
    • https://s3.amazonaws.com/paropabaru/18934678841.pdfIn PDF document text
    • https://s3.amazonaws.com/ravuxudibure/mera_bhola_hai_bhandari_song_djbaap.pdfIn PDF document text
    • https://9dc8676a-0e58-44ee-a512-e339c7094702.filesusr.com/ugd/7c0652_2bb07853c33d4daaaf4e166ff9f22324.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gavapozalilup/the_final_quest_trilogy_books.pdfIn PDF document text
    • https://972af30b-04c2-4618-b911-83ba0b7fef9e.filesusr.com/ugd/84a5c6_eefe35c1e88e4c8c89fcab4a7fc4b190.pdf?index=trueIn 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_off0000f0f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F8 6652 bytes
SHA-256: 49063d356e248dab65e6731f96a41a098a70934f057cc4a2f23699d3d8d51f21
font_01_sfnt_off00010781.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10781 10544 bytes
SHA-256: cee1acb473e61a81b237c2c9e8dd9f088bec2a1007227cd97f095dccb193ef72

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