Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3f2d78940d1a51d…

MALICIOUS

PDF

89.8 KB Created: 2021-04-03 20:57:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 6ea0104d90071165bc4bdaf091842bcf SHA-1: 6f24aedc4131380a5eef975a2512650155219b77 SHA-256: f3f2d78940d1a51d4cedad7a743d05a1ce571a3fb8ff18a34a5dede62bfeb7d9
154 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, and is flagged by ML classifiers and ClamAV as malicious phishing content. The presence of a 'download button' lure and callback phishing indicators suggest a deceptive workflow. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with attempts to redirect users to malicious sites or initiate downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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.
  • 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.
  • 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://maypoin.ru/strik?utm_term=find+the+closest+dunkin+donuts+to+my+location PDF link annotation
    • https://bewapuvin.weebly.com/uploads/1/3/1/4/131453684/1217173.pdfIn PDF document text
    • https://rujijixagav.weebly.com/uploads/1/3/1/3/131383475/6043731.pdfIn PDF document text
    • http://zawubitukete.22web.org/74376931708.pdfIn PDF document text
    • https://cdn.sqhk.co/dagufiwus/gdza1SZ/70607843885.pdfIn PDF document text
    • http://zovemijeban.iblogger.org/13659758987.pdfIn PDF document text
    • https://cdn.sqhk.co/vobipibomuk/hiwcUXX/lurexakeworesalupebo.pdfIn PDF document text
    • https://xotugakifegug.weebly.com/uploads/1/3/4/1/134131530/4671250.pdfIn PDF document text
    • https://cdn.sqhk.co/julukimesof/d7hguUn/81527378793.pdfIn PDF document text
    • https://cdn.sqhk.co/jekuzedu/ghlwycK/aashiqui_3_all_songs_320kbps.pdfIn PDF document text
    • https://wadasazaba.weebly.com/uploads/1/3/3/9/133999184/rowag.pdfIn PDF document text
    • https://cdn.sqhk.co/lapefuxolu/ixohhgj/1016011800.pdfIn PDF document text
    • https://tisuzibe.weebly.com/uploads/1/3/1/3/131379312/8000c6672dc.pdfIn PDF document text
    • https://varudidijosafi.weebly.com/uploads/1/3/5/3/135316544/nimefawozu_wujab.pdfIn PDF document text
    • https://puxolulif.weebly.com/uploads/1/3/4/3/134356270/solanamasibaxez-vuporifetoxu.pdfIn PDF document text
    • http://sebekeruxa.iblogger.org/61581839868.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xidulumexi/best_app_for_bafx_obd2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ddcfc48f-2e28-47ee-bf3f-47545993afc3/jotiwinuvezo.pdfIn PDF document text
    • https://s3.amazonaws.com/retisovojor/sovikefizevokupojaka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cd1ec8f-70e8-484a-896e-8710cc118356/how_many_red_club_cards_are_in_a_deck.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fec45739-3176-4028-840b-00f3d492f2c9/oppositional_consciousness_methodology_of_the_oppressed.pdfIn PDF document text
    • http://zitejilid.epizy.com/welcome_to_gotham_city_fortnite_cheat_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/juliziwojatige/bulb_smash_unlimited_paytm_cash_mod_apk.pdfIn PDF document text
    • http://nipetemazoxiveg.rf.gd/clinical_veterinary_microbiology_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2495987-f1cf-49de-b8c5-c59e0f11b473/can_alkaline_diet_help_acid_reflux.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_off00011dac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DAC 5204 bytes
SHA-256: 039f91cc023dc0338f50b5074faea2174bca55227eeeede35704b7c7afc9cc19
font_01_sfnt_off00012f47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F47 12676 bytes
SHA-256: b226846951dcfcb6f19e1c13e44136e6627ec05bab8c70dd549bad479a0a65f8