Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5f432d701ebd290…

MALICIOUS

PDF

35.2 KB Created: 2020-10-25 05:03:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: d5fe2eaa6651a8bc538cd6cf24dab232 SHA-1: 67a105b0394566a67558b6a579bec136f1892aa3 SHA-256: b5f432d701ebd2909d3626d7aa686d44381d3347970e37f12456552e05337519
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Weebly-hosted PDFs, suggesting a link farm or SEO manipulation tactic. One of the primary links, 'https://ggtraff.ru/wb?keyword=welch%20allyn%20cardioperfect%20spirometer%20manual', is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains URLs that are likely part of this malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://ggtraff.ru/wb?keyword=welch%20allyn%20cardioperfect%20spirometer%20manual In PDF document text
    • https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/tamegevikijovigo.pdfIn PDF document text
    • https://xonuveviriniw.weebly.com/uploads/1/3/0/7/130738603/zevegojakovonipojaz.pdfIn PDF document text
    • https://sijevunima.weebly.com/uploads/1/3/1/8/131859613/maraduzimibi.pdfIn PDF document text
    • https://rabexowubomisuw.weebly.com/uploads/1/3/1/4/131407155/jupumepuravaz.pdfIn PDF document text
    • https://jazexupojofon.weebly.com/uploads/1/3/1/4/131409098/7b3445ce.pdfIn PDF document text
    • https://mawajajapok.weebly.com/uploads/1/3/4/3/134353668/kipevoxos_wujikipog_wifav_rifesoweduzo.pdfIn PDF document text
    • https://tipefejiri.weebly.com/uploads/1/3/0/9/130969755/gerogewupag-fikupejoku-ratobolut.pdfIn PDF document text
    • https://sixapinipuso.weebly.com/uploads/1/3/1/3/131384402/9900448.pdfIn PDF document text
    • https://nipaxibovaj.weebly.com/uploads/1/3/1/3/131379211/8651555.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/b4b3eb38b.pdfIn PDF document text
    • https://babinekisifuve.weebly.com/uploads/1/3/2/6/132696104/zevazeba.pdfIn PDF document text
    • https://kurikezexiwu.weebly.com/uploads/1/3/0/7/130775092/4c189b183c97df.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/1158663.pdfIn PDF document text
    • https://tusemebi.weebly.com/uploads/1/3/4/3/134316443/3498508.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/rovikibixu/agile_project_management_with_scrum_roman_pichler.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/bebol.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/66220488600.pdfIn PDF document text
    • https://s3.amazonaws.com/vinivuxo/13226541792.pdfIn PDF document text
    • https://s3.amazonaws.com/mavixu/36544037337.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/ginepawikaxa.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/bepukodejukopagat.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

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_off00004914.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4914 5508 bytes
SHA-256: 78601283388267692c7fb5adc60d6d27ede74e5affc0df5967ee688cda2cfab0
font_01_sfnt_off00005bc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BC1 11084 bytes
SHA-256: be1fa2cff7d69c9dda0c6c0402bfb6993e9ddd030a67190108fe035be7bb2b65

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