Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f610e68fb2c6cf2…

MALICIOUS

PDF

71.7 KB Created: 2021-03-25 12:18:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: ef34ac4793fbe7a9255aa1f7bb31dc87 SHA-1: c43f786a4112f3804fe09464d4cc9a456ac26d96 SHA-256: 8f610e68fb2c6cf26680820105911bceb79ad59f5b9f7ae90620cbb25be3fbbb
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs pointing to external websites, many of which are hosted on disposable domains and appear to be part of a link farm. Heuristics indicate this PDF is a link farm and has been flagged by ML and ClamAV as malicious, specifically as a phishing or trojan. The presence of embedded URLs suggests an attempt to redirect the user to malicious content, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://druttle.ru/123?utm_term=adding+ing+worksheet+ks1 PDF link annotation
    • https://cdn.sqhk.co/subogutaze/aibjbgc/24506637589.pdfIn PDF document text
    • https://cdn.sqhk.co/letojeka/ifohejb/predator_fishing_boat_portpatrick.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460251/normal_5fd15984d7634.pdfIn PDF document text
    • http://esmoney.site/jibixezotolojizevatexupqyhsv.pdfIn PDF document text
    • http://zavarivaemvmeste.ru/pl_sql_tutorial_downloadyo23h.pdfIn PDF document text
    • https://cdn.sqhk.co/tejurorado/2jeOjdj/fugasowidudikajokota.pdfIn PDF document text
    • https://cdn.sqhk.co/vekazedivipi/cjggiha/97358365366.pdfIn PDF document text
    • http://geosen.net/boxelbot_platform_games_listi1j9y.pdfIn PDF document text
    • http://tersq.fun/does_obamacare_actually_workzhmmg.pdfIn PDF document text
    • http://healsmall.space/56706629488d3tcm.pdfIn PDF document text
    • https://cdn.sqhk.co/nivabetaz/iAy4K2k/best_slasher_build_2k20.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403819/normal_5ff2084b72b9b.pdfIn PDF document text
    • https://cdn.sqhk.co/livaxipovage/emhccyl/bejeweled_blitz_free_full_version_download_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/koxajavu/igwEgLD/cyberfoot_2020_mod_unlimited_money.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374682/normal_602f2f26633fd.pdfIn PDF document text
    • https://cdn.sqhk.co/kugugofawaz/pnk1jaX/liwebezipenagemox.pdfIn PDF document text
    • http://blancop.xyz/identifying_nouns_pronouns_and_adjectives_worksheetsrxczf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473971/normal_600ced67c850e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383322/normal_5fdec6026a314.pdfIn PDF document text
    • http://fastgetme.online/how_to_use_a_digital_multimeter_on_a_car_alternatorz4xn9.pdfIn PDF document text
    • http://winoraama.fun/tofabesubivosogowovagelmqfm.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://jezawirigi.epizy.com/la_boite_a_merveille.pdfIn PDF document text
    • http://sipofepusadofas.rf.gd/gemifawemuj.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE04 4832 bytes
SHA-256: 863256a9a5ae582067b54e3f41a2863b44126d1002f7a0673078ba48f4974d2c
font_01_sfnt_off0000de7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE7C 10784 bytes
SHA-256: 4e5d4612dde2f30e1c892f69e29d8bfe0ac4cd96a0f5bc901afda076ffd4e083
font_02_sfnt_off0001035b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1035B 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

Open this report in the interactive analyzer, or submit your own file for analysis.