Malicious PDF — malware analysis report

Static analysis result for SHA-256 c30ffa7360aadcf8…

MALICIOUS

PDF

77.7 KB Created: 2021-03-14 01:26:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: f89242c12f3570f98affb5e051776482 SHA-1: 955ae40bafdbc2d27ffe9599e5ba8111c49b0adf SHA-256: c30ffa7360aadcf89986ad8008815c8d46ffca9dcd7e5ff2072e17f7ba98b3f9
304 Risk Score

Malware Insights

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

This PDF document contains numerous links to external websites, many of which are hosted on disposable domains and appear to be part of a link farm designed to lure users. One critical heuristic identified a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains references to a 'Spalding 54 hercules acrylic portable basketball hoop system costco', suggesting a lure to a potentially fraudulent product or service. The presence of multiple PDF link farm heuristics and a malicious redirector link strongly indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 8

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.
  • 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://crophysi.ru/strik?utm_term=spalding+54+hercules+acrylic+portable+basketball+hoop+system+costco In PDF document text
    • https://wutowenejeboz.weebly.com/uploads/1/3/4/5/134599911/lowoganimetawilofo.pdfIn PDF document text
    • https://jarowuvuvam.weebly.com/uploads/1/3/4/6/134614172/fe2c7.pdfIn PDF document text
    • https://revafabeku.weebly.com/uploads/1/3/4/7/134708131/papanugev-miwugupa-watufuxedo-loxutadodo.pdfIn PDF document text
    • https://golewobewawir.weebly.com/uploads/1/3/4/3/134350879/nuwokijebeliwuvutag.pdfIn PDF document text
    • https://nawobelif.weebly.com/uploads/1/3/5/3/135307193/6037e.pdfIn PDF document text
    • http://remont-kholodilnikov.website/81668510000egcm1.pdfIn PDF document text
    • http://organicsss.space/92685076960t8ysb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488806/normal_5fe8a806f3fa7.pdfIn PDF document text
    • https://lepeposozul.weebly.com/uploads/1/3/5/3/135317560/2039393.pdfIn PDF document text
    • https://tuwakunasuj.weebly.com/uploads/1/3/0/8/130874309/84b1e84873fa3e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417429/normal_6046584729e92.pdfIn PDF document text
    • https://pakedarisibibo.weebly.com/uploads/1/3/4/5/134501134/8653132.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460677/normal_5ff9503810b69.pdfIn PDF document text
    • https://zanikegira.weebly.com/uploads/1/3/1/4/131437850/02d3393d.pdfIn PDF document text
    • https://images.step2.com/images/products/v2/retina/735600_001.jpghttps://www.spalding.com/dw/image/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mewabetowa.myartsonline.com/tironapod.pdfIn PDF document text
    • https://s3.amazonaws.com/biwubeleba/73975184856.pdfIn PDF document text
    • https://s3.amazonaws.com/wudibirewuduto/katarina_guide_u._gg.pdfIn PDF document text
    • https://s3.amazonaws.com/medaliwifufugel/canederli_al_formaggio_alto_adige.pdfIn PDF document text
    • http://xuvekixofeku.onlinewebshop.net/los_ros_de_color_prpura_serie_calle_13.pdfIn PDF document text
    • https://s3.amazonaws.com/bodajaku/imso_2018_answer.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_off0000eb38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB38 6108 bytes
SHA-256: f9618eceef048d468392f2ea5cc27af7bd67d1b15c7caa6500d94c2962137a0b
font_01_sfnt_off0000ffe7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFE7 12368 bytes
SHA-256: 6a891c2e67207d87b9f39e601795e7c9f331074cd41114f6127a01e0fe248eb3

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