Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e07f40b3d9fb8c0…

MALICIOUS

PDF

92.8 KB Created: 2021-05-18 17:25:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 81ff3fffa083478cad933d3bcf9a6265 SHA-1: 9efae954b38eb19cee732e46ebb224ccb108c60a SHA-256: 3e07f40b3d9fb8c04e643c5682fe79477a50682e97edcfef0d39c1eb335a4099
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/strik?utm_term=ap+us+history+exam+2021+study+guide PDF link annotation
    • https://tufezojaf.weebly.com/uploads/1/3/1/3/131384552/ginuremaxebedujab.pdfIn PDF document text
    • http://kebukodakaver.iblogger.org/bible_free_download.pdfIn PDF document text
    • http://nigasutoxik.22web.org/chemistry_of_alkyl_halides.pdfIn PDF document text
    • http://mefusanizuze.iblogger.org/cadet_recruitment_2020_application_form.pdfIn PDF document text
    • https://dulumomotuvubu.weebly.com/uploads/1/3/4/7/134759228/bozirat-zolesokiru.pdfIn PDF document text
    • https://zovakobazala.weebly.com/uploads/1/3/1/4/131456363/xerifogagu_bobosefazexe_wixuno_rupafan.pdfIn PDF document text
    • https://depagolal.weebly.com/uploads/1/3/0/8/130813973/jivumurox.pdfIn PDF document text
    • https://jevixivuxed.weebly.com/uploads/1/3/4/6/134622771/ketazeduxa.pdfIn PDF document text
    • http://mavedelusudefiv.22web.org/d_d_character_sheet_editable_5e.pdfIn PDF document text
    • https://nusuxoxoli.weebly.com/uploads/1/3/2/7/132710665/bowikaxemuwumafepesa.pdfIn PDF document text
    • https://jasadugo.weebly.com/uploads/1/3/5/3/135341750/f15fe2cafe.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
    • http://dawonudugol.rf.gd/86999091448.pdfIn PDF document text
    • https://s3.amazonaws.com/lezopobigeza/likizukunebiwum.pdfIn PDF document text
    • http://xuxirifuv.rf.gd/tozimizabezolatisofip.pdfIn PDF document text
    • https://s3.amazonaws.com/tisegovofu/85394822317.pdfIn PDF document text
    • http://zilajib.epizy.com/nursery_rhymes_for_preschool_free.pdfIn PDF document text
    • http://tedesuvu.rf.gd/negexipebukikexima.pdfIn PDF document text
    • http://gozosowizopuk.rf.gd/25446229738.pdfIn PDF document text
    • http://dawozisi.rf.gd/93840382819.pdfIn PDF document text
    • https://s3.amazonaws.com/bojafazes/how_to_be_a_better_pr_professional.pdfIn PDF document text
    • http://luxetejafolakem.rf.gd/diphenoxylate_with_atropine_davis.pdfIn PDF document text
    • http://sutuguve.rf.gd/85723144226.pdfIn PDF document text
    • https://s3.amazonaws.com/boduxatavepe/sakenozurerefojafarebuw.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_off0000f048.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF048 5600 bytes
SHA-256: 0472b0d0496df76acc32d872fda4a38ded334c914006b39a6d1045346be27316
font_01_sfnt_off00010369.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10369 7692 bytes
SHA-256: 3288a3e6bd3b1569ad1cc063843e8539ba73110ae5c9312b57356d2c8db29740
font_02_sfnt_off00011ad0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AD0 11140 bytes
SHA-256: 10d8d8c44ba714cdba69b8710d92c1e645a70a1369e5d5a318250c7ffa7f5bb4
font_03_sfnt_off000140ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140EC 16392 bytes
SHA-256: e66abfbeddc1d19d92dcb25e98d0a5acfcfed5afa902c0cdbe1883ebc60d8997
font_04_sfnt_off00015699.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15699 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3