Malicious PDF — malware analysis report

Static analysis result for SHA-256 71222de0f338bddc…

MALICIOUS

PDF

69.4 KB Created: 2020-12-18 02:21:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: f597cab401946459beb5d2181e28b96b SHA-1: b833abb791d7dbc1c670c491b2d81e612a42e70d SHA-256: 71222de0f338bddcbb077eb38f2c2efc320532facc9034bcd02e037d5d4597f6
222 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, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ggtraff.ru/aws?utm_term=c+shaped+canal+case+report In PDF document text
    • https://pemopexo.weebly.com/uploads/1/3/4/3/134305592/6380985.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385850/normal_5f9a072d1d57a.pdfIn PDF document text
    • https://jadigitunuw.weebly.com/uploads/1/3/4/6/134672933/9376109.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cf1bb04-558e-4eb1-9396-01d85708b68c/smith_van_ness_7_edicion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e507241-8bae-4c57-ae48-12932151dc7f/harmony_electric_guitar_h802.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5748f03-7b72-47a8-882a-0d664d537f60/grey_concrete_powder_minecraft.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2e03b1c8c7413143ed9a1/t/5fc44dd73570fb44d18c290f/1606700505251/pinomuvenof.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbfd1e0c89e1c4b8fb81223/t/5fc0e5b4a97599144e182b36/1606477236973/the_tell_tale_heart_figurative_language.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcdebd2c2968904bcc581e9/t/5fd6bcb0b1c3f31c7a8fd8a7/1607908528615/ansys_workbench_tutorial_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b858f4a-cb34-4a6c-8dcd-e03c73c570be/50008670635.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc329c41c8c74131440bc1b/t/5fcc935433187724c4ec1a9a/1607242584009/dinoland_play_center_dearborn_heights.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_off0000d1d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1D6 5064 bytes
SHA-256: 5da5f160260e64929205399d949a3729258b5ce2d61a1e86d65124a1307ffeae
font_01_sfnt_off0000e304.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE304 10664 bytes
SHA-256: 6348dc7ab8a5da8e05d3a0eff1a22945b14e355dd2978a5f1628ddb6b5af6626

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