Malicious PDF — malware analysis report

Static analysis result for SHA-256 756f575c47df3167…

MALICIOUS

PDF

85.7 KB Created: 2021-03-15 23:00:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 9f3ddd31bda6b0768abf915bfc2d5b56 SHA-1: 686378b7131f6f87de2f0aad0633f538f15327ab SHA-256: 756f575c47df316754ff50d16537f1004b81ea0d1bea63c6501a8448c0662554
206 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including ClamAV and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO abuse tactic. The presence of embedded URLs and the structure indicate an attempt to redirect users to malicious sites, likely for phishing or malware distribution. No scripts were extracted, but the overall pattern suggests a malicious document designed to lead users to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation 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.
  • 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://zajinet.ru/strik?utm_term=ford+mustang+convertible+new+price PDF link annotation
    • https://ruposasaje.weebly.com/uploads/1/3/4/3/134372592/mutopiwuboko_xitezodo_gujukebijuzoka.pdfIn PDF document text
    • https://butadopol.weebly.com/uploads/1/3/1/3/131378795/gujidomofekufonifo.pdfIn PDF document text
    • http://vunekopewode.22web.org/kadimamivapanekinujuvez.pdfIn PDF document text
    • http://favovuzoxegavix.22web.org/50788384220.pdfIn PDF document text
    • http://kotuputepoworug.22web.org/king_lear_sparknotes_act_2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407724/normal_6015ca5799238.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487894/normal_5fdd99389588a.pdfIn PDF document text
    • https://lupomixuliwir.weebly.com/uploads/1/3/4/7/134728854/losudiwo.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
    • https://uploads.strikinglycdn.com/files/1513c14b-78a9-430e-aadf-2b09c325de00/70199702373.pdfIn PDF document text
    • http://temomij.epizy.com/chalo_full_movie_com.pdfIn PDF document text
    • http://pilizitawew.rf.gd/23614932350.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6805b473-8f9c-41b3-bcdd-6198af9cb7f5/how_much_do_scouts_get_paid.pdfIn PDF document text
    • http://fowafad.epizy.com/which_yoga_is_good_for_anxiety.pdfIn PDF document text
    • http://fiwajewefafomi.epizy.com/ravujeniwevozazifike.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95c2e201-a7ce-42c2-a7cb-afe2a7e7575a/patudiduvewogugexuvo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ff1e021-536a-4e9a-94c4-5b2e8604ac73/49546090106.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9663581f-ead7-4201-85b5-372344b06785/vokapafel.pdfIn PDF document text
    • http://xilekur.epizy.com/22075325892.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22524b45-b914-4aef-9d40-688083af0cec/cant_help_falling_in_love_with_you_chords_guitar_easy.pdfIn PDF document text
    • http://limepupotof.epizy.com/add_text_to_acrobat_reader.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f1f403c-f2b1-4905-9fd2-1b62668f3fef/mxr_10_band_eq_black.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_off000101dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101DC 5520 bytes
SHA-256: 1fe33be06455d94d9a7d2e6894ed3a01206f8a253ea1621ed5e1a81796b4cecb
font_01_sfnt_off00011496.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11496 11180 bytes
SHA-256: b96975412a807c7cedd65b96ef55b593b5a6c09e87c0bcc34fcd6f0a8e892e2c
font_02_sfnt_off00013ada.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13ADA 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230