Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e9be81a0bc60078…

MALICIOUS

PDF

48.9 KB Created: 2020-04-14 21:06:16 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 085fdb3557626b5c11d0b3d8578d5141 SHA-1: 4ee12d0596ac75df4ad776d549944a7d30e676ba SHA-256: 9e9be81a0bc6007841db63b1a7ff34454de0e8cee3eab80a8cf510b3c35d27ad
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a heuristic firing for a 'Callback phishing phone lure' and a 'PDF_SEO_LINK_FARM' which indicates a large number of external links. The document body, though heavily obfuscated, contains a URL that appears to be a lure related to an Android update. The presence of numerous external links, including those with numeric slugs and potentially misleading filenames, suggests an attempt to direct users to malicious or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 6

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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 http://hermajesticbeauty.com/uploads/1/3/0/2/130288399/130288399.html#aggiornamento+android+9+huawei PDF link annotation
    • http://sharonechin.com/uploads/1/3/0/5/130588960/puwazujiwa-jowurona-tazefoxasexoz.pdfIn PDF document text
    • http://fieldresourcesinternational.com/uploads/1/3/1/4/131437418/e77225.pdfIn PDF document text
    • http://healthcaresimulationconsultant.ca/uploads/1/3/0/2/130291350/2940230.pdfIn PDF document text
    • http://premierbwmassage.com/uploads/1/3/1/3/131384260/pilofudal.pdfIn PDF document text
    • http://cultivationx.com/uploads/1/3/0/2/130271152/zabizu_jokujorexi_xefed_lelidip.pdfIn PDF document text
    • http://freetheperiod.com/uploads/1/3/0/6/130639779/349263.pdfIn PDF document text
    • http://consumer.0In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008ad0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AD0 9764 bytes
SHA-256: 47aa851797f3aec88b24b4118e12df01a89efc79c0951bae7cfa2c5df07e94a3
font_01_sfnt_off0000ae36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE36 2668 bytes
SHA-256: bb66d78edca8aa75a8db461931e44ad6eab12e4cd439df836d92d13c6ef6c22d

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