Malicious PDF — malware analysis report

Static analysis result for SHA-256 93ad5dd2452a4b72…

MALICIOUS

PDF

100.8 KB Created: 2021-04-25 02:28:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 0db173f5d46c663fbb71204b2622a52d SHA-1: 23aa8d1759f1d46f97e268601e250b6670456d70 SHA-256: 93ad5dd2452a4b7200808170db1749b19c81f12c0d23b1998810c1eeb1515536
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a large number of embedded links, many of which point to known malicious redirector infrastructure or disposable hosting. The primary URL identified, 'https://yafferge.ru/strik?utm_term=how+to+verify+bitcoin+on+cash+app', suggests a phishing lure related to cryptocurrency. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/strik?utm_term=how+to+verify+bitcoin+on+cash+app In PDF document text
    • https://gebedosoxabitox.weebly.com/uploads/1/3/5/3/135324181/gexapitavapodomoxi.pdfIn PDF document text
    • https://tomosuboma.weebly.com/uploads/1/3/5/3/135382902/jorarefafunimoz.pdfIn PDF document text
    • https://pasadaxadug.weebly.com/uploads/1/3/5/3/135390708/pukokisobisasu-limupenufe.pdfIn PDF document text
    • https://tumipipap.weebly.com/uploads/1/3/4/5/134598024/lelaxosazed.pdfIn PDF document text
    • https://genofegewad.weebly.com/uploads/1/3/0/7/130776157/manowupe.pdfIn PDF document text
    • https://davufafelasipip.weebly.com/uploads/1/3/4/3/134328138/8e63d.pdfIn PDF document text
    • https://mumevukuzo.weebly.com/uploads/1/3/5/3/135327759/ziwatelusonenit_xujuf_vegesuduj.pdfIn PDF document text
    • https://redavifiludog.weebly.com/uploads/1/3/5/3/135348979/9411848.pdfIn PDF document text
    • https://botakukejase.weebly.com/uploads/1/3/4/6/134610266/1099064.pdfIn PDF document text
    • http://fitness-ital.fun/137833912077pe8p.pdfIn PDF document text
    • http://tuimag.ru/nisoxipuzasgf28z.pdfIn PDF document text
    • https://tekerigaxigo.weebly.com/uploads/1/3/4/7/134702693/doroto.pdfIn PDF document text
    • https://duvokazi.weebly.com/uploads/1/3/4/1/134108747/dukuru_paxijikuxawi_tumab.pdfIn PDF document text
    • https://jobadenel.weebly.com/uploads/1/3/1/1/131164033/e2732951.pdfIn PDF document text
    • https://tirugisig.weebly.com/uploads/1/3/0/7/130738706/352225.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b64dd490-e5b9-492f-89ff-e398ecee904c.filesusr.com/ugd/5926b4_36ec392fd25d4eae903fab5e620e0722.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sorapobuk/play_iso_ps2_emulator_android.pdfIn PDF document text
    • https://368af19b-b9be-4417-8ea7-dfc4611f9fec.filesusr.com/ugd/abd4c0_9a76ce80b0da46058946f3dc7107e771.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nelizenejakarug/thomas_merton_books_list.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_off00014b2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B2C 5424 bytes
SHA-256: 0648fa8870381b3bc5037a34907d5644215e9259d787baa50247551b7b2c7edf
font_01_sfnt_off00015db5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15DB5 11656 bytes
SHA-256: c625ff9998f160e8f6994cd525a6a132e395ba335060257cdb4a5038df933ee1

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