Malicious PDF — malware analysis report

Static analysis result for SHA-256 db210960a4e41ca2…

MALICIOUS

PDF

79.5 KB Created: 2021-03-09 19:00:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 970a45d6f7c1a806f3b4d668a079fc62 SHA-1: eca82aa96b313a1ec0ca5911922b1b2e6ef40db6 SHA-256: db210960a4e41ca2af31de8c7cf84a082683a02319324ee4572a56e90af21465
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable domains and are part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The primary lure appears to be free flower images, directing users to potentially harmful 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://maypoin.ru/123?utm_term=flower+images+free++for+mobile PDF link annotation
    • https://cdn.sqhk.co/fuwasokeg/egcVjai/mifijuxamizufewuxises.pdfIn PDF document text
    • https://cdn.sqhk.co/jogepirar/2vhdhay/98106247830.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411691/normal_5fe27ead65e19.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383475/normal_6040ac99a5a4b.pdfIn PDF document text
    • http://gisonanezoboru.iblogger.org/27598177978.pdfIn PDF document text
    • http://lupepujalin.iblogger.org/92087530882.pdfIn PDF document text
    • https://xuzitimezavut.weebly.com/uploads/1/3/1/8/131856372/e95d980632847cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380876/normal_5fe76cc40fd5e.pdfIn PDF document text
    • https://sobapeseg.weebly.com/uploads/1/3/1/0/131070394/sebuxibaw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/f3fce357-85d8-42c2-8b8c-350ce935213e/xepitedug.pdfIn PDF document text
    • http://zitilidi.rf.gd/destination_b1_answer_key_progress_test_2.pdfIn PDF document text
    • http://rodigosixe.rf.gd/jennifer_rothschild_bible_study_me_myself_and_lies.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cca6c283-ca01-42f4-bef0-089af582e492/jatiwedebewaniwalixawurex.pdfIn PDF document text
    • http://dojovosis.rf.gd/mutants_and_masterminds_3e.pdfIn PDF document text
    • http://ronufabadexulab.epizy.com/bollywood_new_hd_video_song_1080p.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fdfc776-2a91-4da2-860d-cc8546f13f90/how_do_i_combine_two_word_documents_together.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24ce4762-28e0-4b98-bb8f-9741973267d3/malofetakedax.pdfIn PDF document text
    • http://vetuvadoxawiton.epizy.com/algorithms_dasgupta_answers.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9F4 4876 bytes
SHA-256: 165a4f105cce6808eadf21bd9314240759e985ff486ab7e7c4bf4d99c2b34ed7
font_01_sfnt_off0000ea95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA95 10080 bytes
SHA-256: 1e267dd6ac5c4090bfffc450dac1457a14bd8b7cb743e2af83fbc362624d93a9
font_02_sfnt_off00010d53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D53 16164 bytes
SHA-256: 4b52fd5da643d9c08cc0a86f773b2f024e3274f3f861dfcac100db1ef433cf06
font_03_sfnt_off0001224d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1224D 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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