Malicious PDF — malware analysis report

Static analysis result for SHA-256 0da20789f5d792f3…

MALICIOUS

PDF

87.9 KB Created: 2021-03-09 17:09:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 65a6810246c02a6d28635e020f30e2fe SHA-1: 5c8bb9f086c85cd35b54373b689e8ad9b47b698d SHA-256: 0da20789f5d792f3a26d1c438706fea438e955f99be135bc910bd7a9d6982017
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains multiple embedded URLs, with one pointing to 'mezovuduw.ru', which is likely a phishing or malware distribution domain. The PDF structure also indicates it's a link farm, further supporting a malicious intent to redirect users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://mezovuduw.ru/award?keyword=cicely+berry+voice+and+the+actor+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4463528/normal_600295bea2018.pdfIn PDF document text
    • http://dixajadabaw.66ghz.com/revamatudufuku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381762/normal_602e0c8aaf8e1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475738/normal_5febdb25e230f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489834/normal_5fd29fc785f38.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391893/normal_5fd5f65468209.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487416/normal_5fc671dfb1151.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381297/normal_5fe6a57f7a240.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vamuxusonepuf.rf.gd/destiny_2_free_to_play_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acdb1d8d-66d2-4ee9-9b26-4f1255966f10/lojirunurafitaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f52c9648-ab57-4392-93e6-d5701ea30d9a/talk_to_me_in_korean_level_1_download_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72e62a73-099f-47c2-a183-dc19d44e99ab/how_to_train_your_dragon_toys_for_sale.pdfIn PDF document text
    • http://xorabaza.rf.gd/bowuruzuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/772ad240-bbaa-4c77-a643-d791cbaf5a1c/96972393016.pdfIn PDF document text
    • http://vepesupilet.epizy.com/wafamiwemiraza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/897b646c-ba1b-46b8-8902-19954910cc74/swann_720p_security_system_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/rixevozajixezos/burnout_revenge_pc.pdfIn PDF document text
    • http://gulabuj.epizy.com/nikon_dx_af-s_nikkor_55-200mm_f4-5.6g_ed.pdfIn PDF document text
    • http://wipedeposadav.rf.gd/22202381374.pdfIn PDF document text
    • https://s3.amazonaws.com/gorajikunobixi/59094787816.pdfIn PDF document text
    • http://fuwujovul.epizy.com/how_true_is_the_blind_side_movie.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000128e4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x128E4 23064 bytes
SHA-256: 44438e38f106ceaab30bbcd55446ffbda7e74c9d478697baaaac1f05c57cc5ec
font_00_sfnt_off0000f29e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF29E 5272 bytes
SHA-256: dd52e50f1da2ac3d836a6ecfec7ea07ac70512edd23b833c10b1dc2ae8023940
font_01_sfnt_off0001048c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1048C 10552 bytes
SHA-256: 0fe3fa9081f29eb36adf1ea639e8c678e874620e0fa23ba41889fefa5c1cd235

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