Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ac1a9a2edb3e0e1…

MALICIOUS

PDF

169.7 KB Created: 2021-03-16 11:16:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 158f695798c436fcd344e1bd9a44bd1a SHA-1: 639fd1811be032bf680c23e8012c035736f77bfd SHA-256: 6ac1a9a2edb3e0e10df96eb4a3a31c64a03c20274cc84ad8fc028a26a28b4ad1
174 Risk Score

Malware Insights

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

The sample is a PDF document flagged by ML classifiers and ClamAV as malicious. Heuristics indicate it functions as a link farm and employs a payment redirection lure, suggesting a phishing or business email compromise attack. The embedded URL points to a domain associated with malicious activity, likely serving as a redirect to a second-stage payload or phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://gimoguvi.ru/strik?utm_term=osha+warehouse+safety+training+ppt PDF link annotation
    • http://bejozenofidon.22web.org/sezaxulukasunoposijezoje.pdfIn PDF document text
    • http://gonzo-3d.com/mejesovexefulec9hn6.pdfIn PDF document text
    • https://cdn.sqhk.co/givikofuf/SjageEH/kepapot.pdfIn PDF document text
    • http://meetsucre.pro/92292345897hf41m.pdfIn PDF document text
    • https://cdn.sqhk.co/joxomawezu/DzbheBK/summer_art_camp_rhode_island.pdfIn PDF document text
    • https://nimivakovi.weebly.com/uploads/1/3/2/3/132302999/lomol_rusesev_fenejewevu.pdfIn PDF document text
    • https://cdn.sqhk.co/zisujidixa/bRgfih0/54551082454.pdfIn PDF document text
    • https://cdn.sqhk.co/midipumep/Eif67Ab/97720831147.pdfIn PDF document text
    • https://cdn.sqhk.co/zexoribuj/xijYWic/zekeleganukeza.pdfIn PDF document text
    • https://redulexaxoxega.weebly.com/uploads/1/3/0/8/130874010/lasuw.pdfIn PDF document text
    • https://cdn.sqhk.co/bomumuxa/wjagggf/download_game_fast_racing_3d_mod_apk_revdl.pdfIn PDF document text
    • https://cdn.sqhk.co/pobijejok/hdjfijM/kuromidufanezogorifowonet.pdfIn PDF document text
    • https://cdn.sqhk.co/nefakovuwot/gjhjhhc/32757638637.pdfIn PDF document text
    • https://cdn.sqhk.co/wagejino/ghcjegc/rumeganizobepiwesuzoze.pdfIn PDF document text
    • https://pixofanipadolu.weebly.com/uploads/1/3/5/3/135326367/putinamenesadi-bujofi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xawexixiwa.rf.gd/midexibawo.pdfIn PDF document text
    • http://zifopodisinuri.rf.gd/transformers_bumblebee_changes_into_new_camaro_song.pdfIn PDF document text
    • http://zuzaxitiruxojax.epizy.com/how_to_find_energy_efficiency_rating.pdfIn PDF document text
    • http://totubixexunilu.epizy.com/amc_10_test_dates.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000247e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x247E8 5352 bytes
SHA-256: 05f5fbbf385ec7b5b4819498002860fe5325720463655ec85451d07f1a5986bf
font_01_sfnt_off00025a31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25A31 11980 bytes
SHA-256: 3031f9f1e82b9502311b16c7f285e13f6967e361abc03eaf7631361bc9ebee6a
font_02_sfnt_off0002831e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2831E 16232 bytes
SHA-256: ee0a29113e05e18cc9dd0aa818c1a56c150b8781d6e006ea1e202f9d193b0bc7

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