Malicious PDF — malware analysis report

Static analysis result for SHA-256 968c391ef4c79b8c…

MALICIOUS

PDF

69.9 KB Created: 2021-02-03 02:32:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: e9650fea0a9588b6cf4c6649f2f96d23 SHA-1: 1efb20dbe9fdc5e538480265e7bebd3e0b2c4019 SHA-256: 968c391ef4c79b8c6b37760058d107e64bafff006d9c496b6fa4c93507ac1c71
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 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leonvi.ru/aws?utm_term=app+store+guidelines+crypto PDF link annotation
    • https://gapigapale.weebly.com/uploads/1/3/4/8/134896702/d09df4d7f73.pdfIn PDF document text
    • https://pebawozo.weebly.com/uploads/1/3/4/8/134865175/rogomef-xonedeletudojot-woraxevij.pdfIn PDF document text
    • https://bekajujoxofutit.weebly.com/uploads/1/3/1/4/131406668/88afe19a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367313/normal_5ff021053710b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485301/normal_5ffb8650a72d2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409616/normal_5ffdfb77063f5.pdfIn PDF document text
    • https://jisiresofuwidi.weebly.com/uploads/1/3/0/7/130739297/9393787.pdfIn PDF document text
    • http://puwaxevajineluk.iblogger.org/86653560378.pdfIn PDF document text
    • https://cdn.sqhk.co/volixusej/dJ4jihb/vujuxolekosedezobedijura.pdfIn PDF document text
    • https://cdn.sqhk.co/perikowep/g3yUI1R/zejojugitugoguvegijafeke.pdfIn PDF document text
    • https://teworovesub.weebly.com/uploads/1/3/0/7/130775402/gevizo.pdfIn PDF document text
    • https://gukozorupo.weebly.com/uploads/1/3/1/4/131411088/f91d65.pdfIn PDF document text
    • https://jozurukezareta.weebly.com/uploads/1/3/4/7/134741488/wusulanu-bizinopolo-wabet.pdfIn PDF document text
    • https://nolulanulupu.weebly.com/uploads/1/3/1/3/131379612/gipamiduwosefoz_rejuberulelu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393018/normal_5ff773f92a1da.pdfIn PDF document text
    • https://bobuwazubugomu.weebly.com/uploads/1/3/4/4/134494734/2833791.pdfIn PDF document text
    • https://bebojeraje.weebly.com/uploads/1/3/5/3/135302211/numupune_dinogob.pdfIn PDF document text
    • https://cdn.sqhk.co/tuxonewebuke/CjiYhbl/42027470871.pdfIn PDF document text
    • https://mapuxotegudu.weebly.com/uploads/1/3/4/3/134356271/diminujuz.pdfIn PDF document text
    • https://woveguzusozor.weebly.com/uploads/1/3/1/3/131383383/4304796.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fakuzilezozo.epizy.com/complex_compound_and_simple_sentences_worksheets.pdfIn PDF document text
    • http://zadagudigewe.rf.gd/6th_grade_essay_writing_worksheets.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_off0000d44e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD44E 5124 bytes
SHA-256: 242cf1d4de7f37116af8dd755b173df25c0bc5acd1a521da76375ee725d9f546
font_01_sfnt_off0000e5db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5DB 10624 bytes
SHA-256: 8d7b3bc1c8dadc3395ada24d6aa99adaa544a13e63419c3e47fefabca72216d4

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