Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1ec4b992ce4a195…

MALICIOUS

PDF

50.6 KB Created: 2020-03-30 05:02:03 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-07
MD5: a6e610e63cbcf7fa83902a98d964bd40 SHA-1: 8892cf6bce29d193d4ed786549df1e2cd29e2f63 SHA-256: a1ec4b992ce4a195f760c0a0682961185c394cc2d131b2e046c2931354cbf04a
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. The document body, though heavily obfuscated, contains references to URLs that are also present in the list of extracted URLs. These URLs likely lead to further malicious content or phishing pages. The ML classifier also strongly indicated maliciousness.

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://reboundat.com/uploads/1/3/0/7/130775014/130775014.html#apple+tree+yard+tv+series+download PDF link annotation
    • http://churchmultiplicationministries.org/uploads/1/3/0/6/130639867/vetaxozogepa.pdfIn PDF document text
    • http://hendersonjared.com/uploads/1/3/0/7/130776016/9347393.pdfIn PDF document text
    • http://jensenedu.com/uploads/1/3/0/7/130776514/fememu_wumokinojiwan_vexodovubi_pitawow.pdfIn PDF document text
    • http://jetcleanuk.net/uploads/1/3/0/2/130287289/5483b7e70d.pdfIn PDF document text
    • http://austinunderwood.com/uploads/1/3/0/7/130775134/f6cd1cd523c2.pdfIn PDF document text
    • http://babystrollerexpo.com/uploads/1/3/0/5/130539074/bd068339813b8f6.pdfIn PDF document text
    • http://amphitriteonline.com/uploads/1/3/1/0/131070001/4b4f532a03.pdfIn PDF document text
    • http://gaytherapy.net/uploads/1/3/0/5/130589278/0dee4cfa.pdfIn PDF document text
    • http://lagravinesejewelersofarizona.com/uploads/1/3/1/0/131070598/1602949.pdfIn PDF document text
    • http://vinylandwoodworkdistrict.com/uploads/1/3/0/8/130814529/romemomuf.pdfIn PDF document text
    • http://cookinglivinggiving.com/uploads/1/3/0/6/130639081/7a761e26ab862c.pdfIn PDF document text
    • http://jwillsartist.com/uploads/1/3/0/5/130588762/pavugiwuli-wupazilo-radegivitita-vitepitagar.pdfIn PDF document text
    • http://thatcarscene.com/uploads/1/3/0/6/130603769/nekazoxulewexajekowu.pdfIn PDF document text
    • http://hotyogaptos.com/uploads/1/3/0/5/130589132/renoturitoju_javuno.pdfIn PDF document text
    • http://criminaldefenseattorneyogden.com/uploads/1/3/0/2/130289334/lovinoniwemutupatu.pdfIn PDF document text
    • http://freemanfillyawfoundation.org/uploads/1/3/0/5/130590282/9121782.pdfIn PDF document text
    • http://warmanddryuk.com/uploads/1/3/0/4/130436096/154870.pdfIn PDF document text
    • http://paralectures.net/uploads/1/3/0/8/130873851/371ea1779ad31.pdfIn PDF document text
    • http://kenjaiphotography.com/uploads/1/3/1/1/131164159/puvogewuralun-zotaz-tuwelo.pdfIn PDF document text
    • http://monamourhome.com/uploads/1/3/0/2/130271035/dolovugoze-sifuxidipi.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn 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_off000086d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86D0 8564 bytes
SHA-256: 860d212f722038f18e58e4e44aeb762bcca41e5fdcc01077dc63f956776d3400
font_01_sfnt_off0000a7aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA7AA 16036 bytes
SHA-256: 1a48559509f7f75063a877bee3d72c2f3225c728dd953cebf65f9a5167f6cbd7

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