Malicious PDF — malware analysis report

Static analysis result for SHA-256 54ffe26be989e1a9…

MALICIOUS

PDF

40.7 KB Created: 2020-05-20 04:05:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 8663d88913911a8edf1132bd581c448f SHA-1: 4c20aa259e15864544ea224944a98913c66631ad SHA-256: 54ffe26be989e1a90ff59191654a536a7d4fbf658b66aa643a18ff3c0f44cb1d
136 Risk Score

Malware Insights

MITRE ATT&CK
T1598 Gather Victim Identity Information T1204 Malicious Link

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The embedded document body text, though partially corrupted, includes a title related to 'Spiritual disciplines for the christian life pdf' and references the wkhtmltopdf tool, suggesting a potential lure. The primary attack pattern involves directing users to a vast array of external PDF files hosted on numerous domains, likely for SEO spam or to distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • 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.
  • 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://taxbizuniversity.com/uploads/1/3/0/5/130541743/130541743.html#spiritual+disciplines+for+the+christian+life+pdf PDF link annotation
    • http://cottonssupply.com/uploads/1/3/1/4/131406263/vowimodumosari_zugafiju_pegaw_wewenaxara.pdfIn PDF document text
    • http://thethirddad.com/uploads/1/3/0/5/130551245/1061470.pdfIn PDF document text
    • http://ryanmurrayconductor.com/uploads/1/3/0/5/130551401/2952686.pdfIn PDF document text
    • http://thecottages.online/uploads/1/3/0/6/130640132/4910708.pdfIn PDF document text
    • http://duocompany.fr/uploads/1/3/1/8/131856523/liputudipawefovig.pdfIn PDF document text
    • http://vinylatm4ud.com/uploads/1/3/0/4/130483886/kugetisefoze-rogis-parer-lobivife.pdfIn PDF document text
    • http://southfloridapurecannaceuticals.com/uploads/1/3/0/5/130589275/6197895.pdfIn PDF document text
    • http://storeoutsideyourdoor.com/uploads/1/3/0/6/130620781/kepimivuzone.pdfIn PDF document text
    • http://charlescpatton.com/uploads/1/3/0/7/130775304/teborabitok-xoxem-viwuze.pdfIn PDF document text
    • http://i-am-angelica.com/uploads/1/3/1/3/131378796/rupogetokozujojep.pdfIn PDF document text
    • http://aftercarekidsfl.com/uploads/1/3/1/3/131384530/romekume_nudobekeror_tatefof_naluka.pdfIn PDF document text
    • http://usapplesupport.co/uploads/1/3/0/3/130323465/7cd3e73067.pdfIn PDF document text
    • http://cameronayres.com/uploads/1/3/1/4/131455543/5421849.pdfIn PDF document text
    • http://januaryiyer.com/uploads/1/3/0/6/130603892/0e8041e6f0.pdfIn PDF document text
    • http://hafsakhanani.com/uploads/1/3/1/4/131405976/vexexe-rixuxonesosor-mizup.pdfIn 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
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 3

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

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000730a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x730A 10620 bytes
SHA-256: 5760111f80af46b3e9f44b7bdece7af13f71742dd261fd4b189bdba0aaf23744

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