Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d9508b46929f75f…

MALICIOUS

PDF

89.4 KB Created: 2021-04-04 22:46:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 3435bc3faee4dd63a07282a9aded463e SHA-1: 3a25c6fb1f5c34bf9098ed39a17e2a0d64fe7dc7 SHA-256: 2d9508b46929f75fccdb0c45ff9952f149785767d7ae3d1b953a1c9f821af943
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs and is identified as a link farm on disposable hosting, suggesting it's designed to redirect users to potentially harmful sites. The presence of embedded URLs and the nature of the heuristics point towards a phishing or malware distribution scheme, likely initiated via a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://vilenefex.ru/wix?keyword=apush+period+7+timeline PDF link annotation
    • http://rkconstructionsucks.com/benami_sampati_act_2017vmcoa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366381/normal_5fcfa08a52a43.pdfIn PDF document text
    • https://faxuritenorajap.weebly.com/uploads/1/3/4/5/134585079/lojezisi_varobejokovax_sazejijexi_dewaxifim.pdfIn PDF document text
    • https://zubosevofugojat.weebly.com/uploads/1/3/4/3/134307347/wasuwokufa.pdfIn PDF document text
    • http://copyright-services-us.com/backpack_literature_5th_edition_downloadmpod5.pdfIn PDF document text
    • http://ergors.space/can_you_watch_two_streams_at_once_on_twitchlwgjr.pdfIn PDF document text
    • https://zalinojawovuga.weebly.com/uploads/1/3/4/8/134886974/caf46b7eac49a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378171/normal_6056a8817e972.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463287/normal_5fe655b8ab077.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425913/normal_60230f4a4d6fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413012/normal_600bf223f308d.pdfIn PDF document text
    • https://voropulunonuz.weebly.com/uploads/1/3/5/3/135316946/petise_wevodobe.pdfIn PDF document text
    • http://free-at.pro/funny_sound_effects_app_for_pct3hxh.pdfIn PDF document text
    • https://pewepexit.weebly.com/uploads/1/3/4/6/134659954/1476007.pdfIn PDF document text
    • http://itactical.xyz/77360055845vbcb6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405186/normal_5fe875cab2363.pdfIn PDF document text
    • http://bigops.fun/pdf_to_word_documents_onlinemqzpw.pdfIn PDF document text
    • http://mmuuue.space/397781452437n2re.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/d44d0aaa-5d68-4cca-b612-0de1d49bfa93/59676911172.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25c7eb5e-7ac5-42c2-af79-955d55ad5ff0/61517419433.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e805141b-0e49-4e94-ab23-1e60871ed750/89368729401.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23dba7e5-f95e-4552-9b78-4f0e28eb0dcc/how_to_load_a_pellet_in_a_760_pumpmaster.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e1b15b4-a37e-4d00-95b0-080206d00dcf/25274571720.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f035.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF035 5060 bytes
SHA-256: 1f3edb52c009a465d93481dd390c3bcf7c70175093377b49b1b4d136700b94c5
font_01_sfnt_off0001013f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1013F 5364 bytes
SHA-256: a2c3ee333b61d2d49371700e29209598da24cf5341584258ccce8a3d69e408cf
font_02_sfnt_off000114b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114B5 10956 bytes
SHA-256: a304893c4fc9102d70f796210500abea6ceccf4390a4e4d333dcd93ac1451fb0
font_03_sfnt_off00013a1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A1F 16292 bytes
SHA-256: 876f0a59a9edd57d236cac90b1b8de2d73c69827fda31b20921a956e6ab4f1bf
font_04_sfnt_off00014fc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FC8 1736 bytes
SHA-256: 74be5bc4d46f64e5c506ae1006f7022dc98ebf960e37c7bf417c2027ca73106d

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