Malicious PDF — malware analysis report

Static analysis result for SHA-256 41944bfb747a8bff…

MALICIOUS

PDF

66.8 KB Created: 2021-03-03 22:00:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 4eb16415707f1dc0201d27aba8fdb1f2 SHA-1: 102e4d3f0b63a8500ebd55dcda4cbc3aecea5213 SHA-256: 41944bfb747a8bff688c97f2810425de4e9de8366f7b8ecb661a61a6059721b3
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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. 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 0.9998

Heuristics 5

  • 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.
  • 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://vilenefex.ru/aws?utm_term=heal+your+life+counseling PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4370062/normal_5fedb5365f38a.pdfIn PDF document text
    • https://gegilegaf.weebly.com/uploads/1/3/1/3/131383227/rosubifola-mepobitofebel-rawokinu-maluzixuwuw.pdfIn PDF document text
    • https://disadoxamegipu.weebly.com/uploads/1/3/4/5/134527150/1865218.pdfIn PDF document text
    • https://poperetaro.weebly.com/uploads/1/3/4/8/134893078/952d9c95f9941.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463824/normal_5fde883bbcf4a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482849/normal_6000891dea045.pdfIn PDF document text
    • http://pafugiwerokamez.iblogger.org/bazarafijakowej.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426957/normal_5fc8d5364fdd7.pdfIn PDF document text
    • https://gutefuwufoja.weebly.com/uploads/1/3/4/4/134460602/9405702.pdfIn PDF document text
    • https://modagifamu.weebly.com/uploads/1/3/5/3/135341464/dabebasezego-dodizedinibopal.pdfIn PDF document text
    • https://taxusuxegob.weebly.com/uploads/1/3/3/9/133997122/2488520.pdfIn PDF document text
    • https://latuxuxapeja.weebly.com/uploads/1/3/0/7/130739017/tiduladi_navase.pdfIn PDF document text
    • http://xozoxas.iblogger.org/vobevek.pdfIn PDF document text
    • https://peninugeba.weebly.com/uploads/1/3/4/6/134666339/tumubulisozutip_tajoxere.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419818/normal_5fc714186d744.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lusafawapinoxe.rf.gd/51391595674.pdfIn PDF document text
    • https://s3.amazonaws.com/zatasipezeg/8220704334.pdfIn PDF document text
    • http://pejulok.epizy.com/brussels_airport_departures_information.pdfIn PDF document text
    • https://s3.amazonaws.com/mutirexa/wuxadarawikavibubow.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_off0000c881.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC881 5112 bytes
SHA-256: df96bbd2e0f215d453fad3af42c4f3f2ff21cdfa882571799627b9ddd887f82f
font_01_sfnt_off0000da01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA01 10624 bytes
SHA-256: 75c18a7a34b297183ee4a6e673e7a135a635d27f77e65dc3db9fb667fe8ac197

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