Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e5678ec0f580d0f…

MALICIOUS

PDF

78.7 KB Created: 2021-04-28 20:43:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 05434d8f51a253b0d22fdf9822403c08 SHA-1: e03170b3a1c8b5817c4841ecd592465b6471b88b SHA-256: 2e5678ec0f580d0fb6a1ecc3766df0b8cfc74d37f99dd0c08e0a0e879170a6a1
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to disposable domains and are likely used for phishing or to host further malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags the document as a link farm on disposable hosting, reinforcing the phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://soxebez.ru/strik?utm_term=how+to+use+french+possessive+adjectives PDF link annotation
    • http://mazers.fun/647588893449ddhj.pdfIn PDF document text
    • http://dfahsdfgjsfg.online/35423487556khp59.pdfIn PDF document text
    • http://shlifovka-pol.website/ropekituvi8mze.pdfIn PDF document text
    • http://byt-upak.ru/asus_m2n68-am_plus_driver_for_windows_8.1ygnwp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426075/normal_601b60cca6a84.pdfIn PDF document text
    • http://help-verification.com/fifty_shades_of_grey_darker_full_movie_2016xg3uq.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461786/normal_5fff03bca2d4a.pdfIn PDF document text
    • http://fruits-summer.fun/65907479109btkax.pdfIn PDF document text
    • http://perevod-card2card24.site/asus_android_driver_for_windows0mwm3.pdfIn PDF document text
    • http://ygrash.website/beat_making_app_apkxj79t.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459623/normal_5ff28c51d65e1.pdfIn PDF document text
    • http://bostpolamos.site/the_two_wires_in_the_figure_figure_1are_made_of_the_same_materiall4rwd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450439/normal_606e6e374c226.pdfIn PDF document text
    • http://salonop.xyz/steins_gate_routesa00at.pdfIn PDF document text
    • http://safetymirrors.xyz/tasikadurisosejokdu2fo.pdfIn PDF document text
    • http://komarovskii.xyz/2011_sentra_maintenance_schedulepm851.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453129/normal_604e1a515e113.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gafedupeba/69000874898.pdfIn PDF document text
    • https://fbaba6ab-37cf-477f-82bd-e10a416eccda.filesusr.com/ugd/3c8574_f2ed1a86c3544caf8574acef4144470a.pdf?index=trueIn PDF document text
    • https://781b76d0-895c-4d4e-90f3-491762fad171.filesusr.com/ugd/894952_b78d408182e446d28122867d3969833a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kujapomib/audio_from_soundcloud_free.pdfIn PDF document text
    • https://ae0ecf71-49bb-4ac4-bba4-d0f2a20d1af9.filesusr.com/ugd/668a47_abcd680e30b544c8a8b149783966f8d2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gotijejaj/ldpe_sheet_manufacturing_process.pdfIn PDF document text
    • https://s3.amazonaws.com/labitajaxatufib/zebikemelowo.pdfIn PDF document text
    • https://d0275d90-c5b4-4c72-b581-d0e2b62fc6dd.filesusr.com/ugd/ee54da_ca0362be1ce947499da37dbbeb057b3d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tirimofufemukat/kohler_archer_tub_installation_guide.pdfIn PDF document text
    • https://0ca3454e-05ac-49fc-8d00-644b1af7be3c.filesusr.com/ugd/8bf3fc_c290e7746dcf461d9d49383b2f0bce0f.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f12a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF12A 5400 bytes
SHA-256: b08043e93d5c507f455e820b5ab839043c440eccea149dcd93d6a1df3ee62e61
font_01_sfnt_off0001039e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1039E 12004 bytes
SHA-256: 2f6734de2d76b7f59985889adf5194af70a83ddf1b1369525c4fc924dbd9ebaf