Malicious PDF — malware analysis report

Static analysis result for SHA-256 84cc12fc9781c3c4…

MALICIOUS

PDF

86.6 KB Created: 2021-03-22 03:47:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 2510e5ebde10315c088e5b78e45737ba SHA-1: e6e3a4779f48918d10ba077e2b9581a7bc4405c1 SHA-256: 84cc12fc9781c3c4b4fde69e69aad086c4fedbb8b602dbf31a0cfff53b81463d
146 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a callback-phone (TOAD) lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 6

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://lozipotod.ru/wix?keyword=penalty+for+not+changing+drivers+license+nj PDF link annotation
    • http://fuvufurewuf.iblogger.org/exercice_corrig_de_atomistique_s1.pdfIn PDF document text
    • https://tesajezu.weebly.com/uploads/1/3/1/4/131452821/f0e689.pdfIn PDF document text
    • https://dagazafija.weebly.com/uploads/1/3/1/4/131484603/dezuzowig_mazako_gajetimakis.pdfIn PDF document text
    • http://kogowetek.getenjoyment.net/54722334330.pdfIn PDF document text
    • https://cdn.sqhk.co/filovixedalu/dxU8RxX/66410936004.pdfIn PDF document text
    • https://cdn.sqhk.co/sasibasodiwu/ifjbibb/friend_function_c_template.pdfIn PDF document text
    • https://furimubabo.weebly.com/uploads/1/3/1/8/131856330/puxov.pdfIn PDF document text
    • http://mesimewipotaz.22web.org/52843591186.pdfIn PDF document text
    • https://cdn.sqhk.co/gunusuxur/hbiLib6/vpn_apk_for_mtn.pdfIn PDF document text
    • http://mamefumiwuto.mywebcommunity.org/how_to_use_slow_cooker.pdfIn PDF document text
    • https://cdn.sqhk.co/bukulavor/fY1jgc6/78940852381.pdfIn PDF document text
    • https://wemeguxenuvoj.weebly.com/uploads/1/3/3/9/133999449/sivujogidifo.pdfIn PDF document text
    • https://cdn.sqhk.co/sovajepuxe/hdIdjim/midekarizujunamofa.pdfIn PDF document text
    • http://xofebuledat.scienceontheweb.net/85215334541.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e601181-276a-46ae-a5c4-d00abcd3fbf3/splinter_cell_chaos_theory_pc_xbox_controller.pdfIn PDF document text
    • http://zusunikumejimet.rf.gd/74251810144.pdfIn PDF document text
    • http://nejedezaxusav.rf.gd/ryanair_case_study_business_strategy.pdfIn PDF document text
    • http://netikijuno.rf.gd/whatsapp_apk_ultima_version_2019_descargar.pdfIn PDF document text
    • http://gitikomaxafu.rf.gd/18410352475.pdfIn PDF document text
    • http://lukobefazerare.rf.gd/yo_amo_a_paquita_gallego_capitulo_106.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7e4ca76-ea49-4386-ad8b-8cb35fc79927/how_to_do_acid_base_titration_problems.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99bb5370-adad-4d7b-8dac-d5c0d8313b7d/nowonelirizateliriwo.pdfIn PDF document text
    • http://zesafemumibow.myartsonline.com/jezusekidifin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50684829-e2e0-454e-8568-11d8ec23abc4/37752530373.pdfIn PDF document text
    • http://tikumomono.rf.gd/nhs_low_back_pain_exercises.pdfIn PDF document text
    • http://xizokokov.epizy.com/download_one_call_away_by_charlie_putt_mp4.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_off000104c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104C4 2856 bytes
SHA-256: 6a7390c9e634f7f167841a75ffa617ce3f7010ba402b4c06ad0a47e5500b6a59
font_01_sfnt_off00010eee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EEE 5524 bytes
SHA-256: 159e0ba111460f0b321fda676fc09d1632e3ac9a513ea4c081f0c9bb67dc21be
font_02_sfnt_off000121cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121CB 11948 bytes
SHA-256: bc3307745f9602d389dfde92208a15e3fb37257347ce05fb7f801aa3731db7a2