Malicious PDF — malware analysis report

Static analysis result for SHA-256 6adbe0dd1ab0ac8d…

MALICIOUS

PDF

76.0 KB Created: 2021-03-25 14:49:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 11a2f6ce54a8a1fdfb4d1f06e3c5f5c6 SHA-1: b28b37a972f8fb31e644a30471c0ee516210baf0 SHA-256: 6adbe0dd1ab0ac8d2bf72cb730b1b4a5074f2caab1ab7d9b940b60abb8e16614
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics indicate the document uses lures to encourage users to enable macros or editing, a common tactic for malware droppers. The presence of external URIs and embedded links suggests the document is designed to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/123?utm_term=cash+book+excel+format+free PDF link annotation
    • http://uscarinsurance.info/12431688600yepmi.pdfIn PDF document text
    • http://tepugorotewole.medianewsonline.com/40757945210.pdfIn PDF document text
    • https://cdn.sqhk.co/peluxisomex/ojf2rii/how_to_make_your_knife_sharpener.pdfIn PDF document text
    • http://idealslimitalia-ufficiale.site/american_military_base_in_stuttgart_germanyu2ddh.pdfIn PDF document text
    • https://cdn.sqhk.co/muligumixe/iffF6Tu/zedge_ringtones_for_iphone_6.pdfIn PDF document text
    • http://riwuveroxuwox.66ghz.com/busepoma.pdfIn PDF document text
    • https://cdn.sqhk.co/dodalowogiv/d5hbijp/free_word_scramble_game_online.pdfIn PDF document text
    • http://summ-ita.space/rutejowatibomerijejufasl5efm.pdfIn PDF document text
    • http://teagreen.space/tidewagemowaru9lnox.pdfIn PDF document text
    • http://zogometemo.sportsontheweb.net/regonixijodakopozakokeziw.pdfIn PDF document text
    • http://kebenoda.scienceontheweb.net/waterfall_model_in_software_testing.pdfIn PDF document text
    • http://yarrebitteh.online/how_to_change_battery_in_samsung_galaxy_4_tablet30le2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pavabiza.atwebpages.com/wedus.pdfIn PDF document text
    • http://xenadixajasole.rf.gd/brother_mfc-7860dw_network_users_guide.pdfIn PDF document text
    • http://mumopuvak.epizy.com/piriformis_syndrome_sciatica_both_legs.pdfIn PDF document text
    • http://zuwodiruvukima.epizy.com/88345399254.pdfIn PDF document text
    • http://ludumidajite.rf.gd/beloved_sparknotes.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A7 5300 bytes
SHA-256: a3bbb683fb321eb70fd641fa5bb0f787499bf417cefc9ab6cb24979e209bcc91
font_01_sfnt_off0000fb86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB86 11456 bytes
SHA-256: be5a93c961bf1e0b76460233763d99db94318ba76801e44a2aaccf63b5a139cd

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