Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fccaa9f392de97c…

MALICIOUS

PDF

78.0 KB Created: 2021-02-13 10:17:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 405c330bb5b8e778d020edae8dc60386 SHA-1: fc926303d695c47b5e45e069c48f7c0b28e37fd3 SHA-256: 6fccaa9f392de97c7a7eef8d3f55c76cc69baf3c447a6d04b2a5e5ba54bfe5e9
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one heuristic specifically identifying a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of embedded URLs suggests an attempt to direct users to potentially malicious or phishing websites, aligning with a spearphishing attachment tactic.

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
  • 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.
  • 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/wb?keyword=bed%20making%20nursing%20pdf In PDF document text
    • https://fetepidema.weebly.com/uploads/1/3/4/6/134684810/zefemaxe.pdfIn PDF document text
    • http://1ux.site/jowiwuwedonebny37g.pdfIn PDF document text
    • https://mokonalu.weebly.com/uploads/1/3/0/7/130739423/444400.pdfIn PDF document text
    • http://itverys.space/20836819083c4y86.pdfIn PDF document text
    • http://kevikakagax.iblogger.org/django_static_css_template.pdfIn PDF document text
    • http://xigegojaliku.iblogger.org/kutilaxu.pdfIn PDF document text
    • http://gogotmif.space/xawefipajaruxafopukevty26q.pdfIn PDF document text
    • https://piwomokoxik.weebly.com/uploads/1/3/5/3/135335333/2253140.pdfIn PDF document text
    • https://bododomeliba.weebly.com/uploads/1/3/1/4/131408614/xumezoselorutobudij.pdfIn PDF document text
    • http://vulifux.66ghz.com/50269844222.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/rijaliwiguvex/hd_movies_direct_link.pdfIn PDF document text
    • https://s3.amazonaws.com/wajufifenoxuj/destruction_warlock_pvp_guide_3._3._5.pdfIn PDF document text
    • https://s3.amazonaws.com/wesezuzuvalirik/79638214968.pdfIn PDF document text
    • https://s3.amazonaws.com/najubu/cheapest_android_phone_philippines_2019.pdfIn PDF document text
    • http://dubaduvuk.rf.gd/bleacher_report_wwe_crown_jewel_results.pdfIn PDF document text
    • https://s3.amazonaws.com/bezorito/91658326518.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_off0000f3c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C8 5440 bytes
SHA-256: a608f5bba4d0af9fff53e3803088cce7666c4264d78e8ae70a23d1d203696b41
font_01_sfnt_off0001063d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1063D 10644 bytes
SHA-256: a6814be3378f7e8ec0c89921d45a00549c7fd78cddc463484776738ff8a435c4

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