Malicious PDF — malware analysis report

Static analysis result for SHA-256 b84a1715179bd490…

MALICIOUS

PDF

83.8 KB Created: 2021-03-17 05:49:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: ee402bbcb03f70ea4df1ed86bee2598c SHA-1: 03855f7ff61aaa307aefa30c69aa9fe06f14b9e5 SHA-256: b84a1715179bd490bf39046ba3bc39229f873054196ef86afbea9d35bb852e8a
126 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links pointing to various domains, many of which are hosted on disposable or suspicious infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing or malware distribution sites. The document body, though heavily obfuscated, contains text related to 'Butterball indoor turkey fryer directions', suggesting a lure to disguise the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://resalured.ru/strik?utm_term=butterball+indoor+turkey+fryer+directions PDF link annotation
    • https://cdn.sqhk.co/peluxisomex/TmwRoKb/48053718763.pdfIn PDF document text
    • https://cdn.sqhk.co/fusozuwalas/bgghdjc/kotiremoripemigemedezek.pdfIn PDF document text
    • https://cdn.sqhk.co/pubisifibuj/fgcicjh/dumifupufolurajovakoziza.pdfIn PDF document text
    • http://uspex22.online/68705699364s6c0y.pdfIn PDF document text
    • http://alcexpress3.xyz/state_and_prove_taylors_theorem_in_complex_analysisjsof7.pdfIn PDF document text
    • https://cdn.sqhk.co/vumusokutil/bHjdvUY/steamship_authority_freight_ferry_schedule.pdfIn PDF document text
    • https://cdn.sqhk.co/repudodo/hngglU5/jazaw.pdfIn PDF document text
    • http://genogiwibodel.iblogger.org/catcher_in_the_rye_chapter_12-13_summary.pdfIn PDF document text
    • https://cdn.sqhk.co/bapisolel/ihdiauK/candy_crush_jelly_saga_level_1305.pdfIn PDF document text
    • http://maliwalilaz.22web.org/vosafenitegipegev.pdfIn PDF document text
    • https://cdn.sqhk.co/xalurubizud/Ljj1Sgj/buku_problem_solving_101.pdfIn PDF document text
    • http://copytoshka.ru/15754693918wg888.pdfIn PDF document text
    • http://bupro.asia/3018408095hzkxp.pdfIn PDF document text
    • http://salea.site/knock_down_bottles_mod_apkcud5b.pdfIn PDF document text
    • http://zelopaqq.xyz/643688712884zm1h.pdfIn PDF document text
    • https://cdn.sqhk.co/rogolafu/QsErGjj/regal_cinema_14_coeur_d_alene_idaho.pdfIn PDF document text
    • http://yazansoft.com/99101161164kyz0x.pdfIn PDF document text
    • https://cdn.sqhk.co/regomesu/ilShjjj/41760916147.pdfIn PDF document text
    • https://cdn.sqhk.co/sogunixe/MLiicwg/t_outliner_clippers_sally_s.pdfIn PDF document text
    • https://cdn.sqhk.co/sejixikerut/GQibMid/cairns_tv_guide_saturday.pdfIn PDF document text
    • https://cdn.sqhk.co/xonepogafix/jcQggic/xrecorder_high-_quality_voice_recorder_app.pdfIn PDF document text
    • http://digitalcalakk1.xyz/how_to_find_the_missing_measure_of_a_trapezoidap4bv.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://rubuvajaroxe.epizy.com/avital_ronell_books.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_off0000fbde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBDE 5252 bytes
SHA-256: 0c7ee33f3a20349e932110c1f6df21071befa3d8d112911ada47c4859aa07467
font_01_sfnt_off00010dcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DCF 11036 bytes
SHA-256: 21f8c4f9df93dbb9e3b61ba2202252b4625d3fda8c69329ed7f19c09204bc608
font_02_sfnt_off0001335f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1335F 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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