Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7dc9582be0e3ed6…

MALICIOUS

PDF

70.7 KB Created: 2020-12-17 23:47:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: db87c6bb860dbf37b88a232dfa945ae1 SHA-1: 78a05e0d8a3e8ed608196b9248e3dbfd143e4f83 SHA-256: d7dc9582be0e3ed6c17c01c2b1525f20a54ff13aa6d1d626c7baeef52447b626
214 Risk Score

Malware Insights

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

The PDF contains embedded links that lead to a link farm of other PDFs, with at least one URL identified as a malicious redirector. The document body, though heavily obfuscated, appears to be a lure related to a timer. The presence of multiple external links and a known malicious redirector suggests an attempt to lead the user to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://traffking.ru/123?utm_term=1+minute+timer+with+music+online In PDF document text
    • https://molawaxurot.weebly.com/uploads/1/3/4/6/134699933/36c73.pdfIn PDF document text
    • https://betedodokadez.weebly.com/uploads/1/3/4/8/134882186/7540be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379842/normal_5fda1d02ad412.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc5451ac30a162e0c6f580a/t/5fc93d89893b2d72962de49b/1607024009918/16033357749.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6d9a3fa9ecc39789baefb/t/5fccf78bcded405bb8da7433/1607268236355/41643242261.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f73d1c8c741314321d77/t/5fc15ce218e72e5fdb0a794d/1606507747568/zesifu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc59f20ff13940aa25faf9a/t/5fc7637b09f4d56e8f849fc1/1606902658297/naughty_boy_ft_zayn.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5a5b03dfdd95b60f57628/t/5fd6d5c7267c8d0ace586c38/1607914952997/mitasasazexefa.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d52e3dfdd95b60d4bb65/t/5fc396b5173fb5383b11ad29/1606653622283/nj_light_rail_map_jersey_city.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc080f7bf71053ccb0e3c67/t/5fc429dce6d49a06bb15f136/1606691293104/dabbling_in_the_demonic_answer_key.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0187aa5bc066edfa15e28/t/5fc12a2bcb3e0f57717946a9/1606494764385/speed_dating_portland_maine.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd00d872f8b574a0f3f61f/1606222042484/4712755606.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5947b0b6b03258f5520ec/t/5fd1c82f8ba64b78df55d1a0/1607583792013/hex_color_picker_mac_download.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_off0000d9a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9A1 4876 bytes
SHA-256: 255994c5b3d0ea8add0b9301968bd3b6fb19827f98bca5f130d0934252e3618d
font_01_sfnt_off0000ea23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA23 10412 bytes
SHA-256: 81b631f7391f3c018c940ee4be60f434e3a18aae3a4f63179f766046bfab3b4d

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