Malicious PDF — malware analysis report

Static analysis result for SHA-256 1925a1bfa15e4fab…

MALICIOUS

PDF

45.1 KB Created: 2020-03-11 05:38:31 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 7ae908368fa05ff737ca996e08c9ab86 SHA-1: c3bfa77685bf1c12bafaea762444d98919ceb7c8 SHA-256: 1925a1bfa15e4fab68e672d0af2d081f0ae912ff6eb82c8f244c00eab4c72025
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file exhibits characteristics of a link farm or SEO spam, embedding a large number of external URLs. The primary heuristic, PDF_SEO_LINK_FARM, indicates the presence of numerous external PDF links, suggesting an attempt to manipulate search engine results or redirect users to potentially malicious content. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, and the document body is heavily obfuscated, making it difficult to determine a more specific attack pattern beyond the link-farming behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://74-123-79-11.mgwnet.com/uploads/1/3/0/4/130476751/130476751.html#chlamydia+trachomatis+portugues PDF link annotation
    • http://mta-sts.wakeforestmarket.com/uploads/1/3/0/5/130539179/fa0adb16.pdfIn PDF document text
    • http://stratfordyouthcentre.com/uploads/1/3/0/4/130435930/5ffdc88c.pdfIn PDF document text
    • http://magicklymodern.shop/uploads/1/3/0/2/130271001/5883006.pdfIn PDF document text
    • http://www.stephenjewelldesign.com/uploads/1/3/0/4/130489025/91984766a35.pdfIn PDF document text
    • http://www.gracecareas.gracepte.com/uploads/1/3/0/8/130873902/nakulavujid_rubawasepi_likaju.pdfIn PDF document text
    • http://punawaiora.com/uploads/1/3/0/7/130739978/4880163.pdfIn PDF document text
    • http://www.allways.net.au/uploads/1/3/0/6/130603767/kububu_jufedoguse_lomijojew.pdfIn PDF document text
    • http://www.marksvandermeer.com/uploads/1/3/0/7/130739509/dibopuva.pdfIn PDF document text
    • http://outsidetheboxapps.com/uploads/1/3/0/3/130313130/2040065.pdfIn PDF document text
    • http://virtueimport.com/uploads/1/3/0/4/130488331/749a11eafb67b9.pdfIn PDF document text
    • http://petershenkinlaw.com/uploads/1/3/0/6/130639115/6771039.pdfIn PDF document text
    • http://www.feldenkrais-sj.com/uploads/1/3/0/2/130274330/lolutaba.pdfIn PDF document text
    • http://erumafsar.com/uploads/1/3/0/3/130379246/nokeside_lixekogonig_niwibe_watezadojumuko.pdfIn PDF document text
    • http://drtoxie.com/uploads/1/3/0/2/130289431/sefij_mivedegasumoka_jifut.pdfIn PDF document text
    • http://jojiescollections.com/uploads/1/3/0/4/130488889/vozezatexivu-mujusiku-vujib.pdfIn PDF document text
    • http://portlandhomesforsaleteam.com/uploads/1/3/0/5/130588625/9109222.pdfIn PDF document text
    • http://hostmaster.joeandjune.de/uploads/1/3/0/6/130604140/weguzuvik_vabebaxamo_fogifojixow_miwotu.pdfIn PDF document text
    • http://truthbetoldmedia.com/uploads/1/3/0/7/130740222/mibujozar-masewezaruwu-pemej-kiwapowufotaf.pdfIn PDF document text
    • http://playpass.net/uploads/1/3/0/7/130776478/8369269.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
🗂 Part of campaign: metairielaw.com 7 samples

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_off000086ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86EC 8340 bytes
SHA-256: 1fa88078bb783bed5aed5f92a1b83108d289463623938d10b7924365f3fbbccc

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