Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6083ba0903222bf…

MALICIOUS

PDF

73.5 KB Created: 2021-03-15 07:47:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: d86ce73ffaec4f5e6cd10530d3065a83 SHA-1: 917de6b4a9867454c0c44b10dbee7fa378dfc953 SHA-256: d6083ba0903222bf2825648d75a30df7e010969c075aef6fd2046ea735499194
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing or SEO link farm attack. It contains numerous external links, with one prominent URL being `https://xajibur.ru/award?keyword=presby+almanac+2020+pdf`. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest an attempt to redirect users to potentially malicious or spam-related content, aligning with common phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://xajibur.ru/award?keyword=presby+almanac+2020+pdf PDF link annotation
    • https://wevikafajaxa.weebly.com/uploads/1/3/1/1/131164556/teginuvitavew.pdfIn PDF document text
    • https://xiligori.weebly.com/uploads/1/3/1/4/131411896/2cf6ba2588.pdfIn PDF document text
    • https://xajevopo.weebly.com/uploads/1/3/2/6/132682124/fasibaxumi_xuvovinuxewopi.pdfIn PDF document text
    • http://loxokunetuladi.66ghz.com/fuvudafal.pdfIn PDF document text
    • https://zitavuzan.weebly.com/uploads/1/3/1/3/131379524/laduriganogij_visonedaxived_nufivivur_palevalun.pdfIn PDF document text
    • https://miluxeto.weebly.com/uploads/1/3/5/3/135326788/1407747.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://6a9ecc2b-05c3-4056-8705-773ae6be8cdd.filesusr.com/ugd/7a359d_e85d1b3fc21e403eaaed90c8ee56d2c0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dezajok/1st_grade_worksheets_for_free.pdfIn PDF document text
    • http://kuxobexajaj.rf.gd/nuzanu.pdfIn PDF document text
    • https://s3.amazonaws.com/murudute/check_internet_speed_mac.pdfIn PDF document text
    • http://keguwaburafokul.epizy.com/rowdy_wear_anthem_song.pdfIn PDF document text
    • https://s3.amazonaws.com/dotivaf/associer_2_ensemble.pdfIn PDF document text
    • https://s3.amazonaws.com/radubozufiwo/what_is_honda_code_b12.pdfIn PDF document text
    • https://s3.amazonaws.com/resisuna/canon_lide_120_scanner_driver.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/177861fe-77ef-483f-90b9-b96e6e90b9c2/can_i_use_any_oil_for_my_chainsaw_chain.pdfIn PDF document text
    • https://55963656-6eb1-4b25-bcd5-bb835d65808b.filesusr.com/ugd/0064ae_bcaa8a51387149bb8475140225f08ff3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/191447b4-56ff-4d41-a252-2526206185bf/30006792669.pdfIn PDF document text
    • https://s3.amazonaws.com/bofake/who_are_the_characters_in_harry_potter_advent_calendar.pdfIn PDF document text
    • https://d0275d90-c5b4-4c72-b581-d0e2b62fc6dd.filesusr.com/ugd/ee54da_8eef4da707c04c3489efb5554a47acb7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mubefula/fodipifaxusuriwijifonoget.pdfIn PDF document text
    • https://6ec3981f-6443-463b-a164-91fc69f101d9.filesusr.com/ugd/7603ae_c24c45cb35684822a0524e71c5fdbc7d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vovuzize/46048696303.pdfIn PDF document text
    • https://s3.amazonaws.com/gumegulaxi/optoma_hd26_review.pdfIn PDF document text
    • https://abaaaae4-9231-44fc-b12c-ad55ebcc68e7.filesusr.com/ugd/2ca09c_52feffb16cdf4d4ea9f80bfced146803.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4FF 5368 bytes
SHA-256: 78baea173dcdd6bf3673a433178631b6b6d48ee4588106da2e3a1c346d67a495
font_01_sfnt_off0000e716.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE716 10328 bytes
SHA-256: 8c58993f57caf15c56434f883796e90819c412801ad216048bb48daf8631f27e
font_02_sfnt_off00010a7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A7A 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2