Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8dd27e45793801f…

MALICIOUS

PDF

59.3 KB Created: 2020-05-21 15:41:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 77ac9cd67e2dce56a85cc9a73c8dc237 SHA-1: 92e608e9a1e631b0b7a069f0e072f3bbf339d7c3 SHA-256: f8dd27e45793801f8896448af116f1e8214a8ae4d1572d17d90924a920c027f6
96 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, suggesting a link farm or phishing campaign. The document body itself is heavily obfuscated and contains some of the same URLs, reinforcing the malicious intent. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://4angelstshirts.com/uploads/1/3/0/6/130621432/130621432.html#%25D1%2581%25D0%25BA%25D0%25B0%25D1%2587%25D0%25B0%25D1%2582%25D1%258C+%25D0%25BF%25D1%2580%25D0%25B8%25D0%25BB%25D0%25BE%25D0%25B6%25D0%25B5%25D0%25BD%25D0%25B8%25D0%25B5+%25D0%25BC%25D1%2583%25D0%25BB%25D1%258C%25D1%2582+%25D0%25BD%25D0%25B0+%25D0%25B0%25D0%25BD%25D0%25B4%25D1%2580%25D0%25BE%25D0%25B8%25D0%25B4 PDF link annotation
    • http://aubonvin.shop/uploads/1/3/0/7/130775806/jofipuk_jakidobox_verepuzegosi.pdfIn PDF document text
    • http://freeericlloyd.com/uploads/1/3/1/4/131407414/wevosoduwif.pdfIn PDF document text
    • http://tamzinmuir.com/uploads/1/3/0/3/130379285/8153601.pdfIn PDF document text
    • http://lakelandfamilydentist.com/uploads/1/3/1/4/131452923/fumudiw-lubojejasaxubu-fokigezup-bonejemonezolen.pdfIn PDF document text
    • http://shapeyourbodyfitness.com/uploads/1/3/0/6/130621915/lapaboleja.pdfIn PDF document text
    • http://elegantsilkhair.com/uploads/1/3/0/6/130621815/9906453.pdfIn PDF document text
    • http://thesupplyguys.org/uploads/1/3/0/8/130873921/f3d12803bbadc56.pdfIn PDF document text
    • http://nclandandhome.net/uploads/1/3/1/6/131606257/gigapilogexofizu.pdfIn PDF document text
    • http://classnstyle.com/uploads/1/3/0/2/130272344/fanopulajepupu.pdfIn PDF document text
    • http://helpingpeopleinneed.net/uploads/1/3/1/1/131163977/ladukaxoxugotop.pdfIn PDF document text
    • http://intesamma.com/uploads/1/3/1/3/131398142/zixaxosemile-jexoladinewojet-koler.pdfIn PDF document text
    • http://augustandnadia.com/uploads/1/3/0/6/130621426/verazob_nutore_gofetofe_poremedemure.pdfIn PDF document text
    • http://drakeoriginalsjewelry.com/uploads/1/3/0/9/130969399/3d112ef8fe.pdfIn PDF document text
    • http://nativityoldcatholic.com/uploads/1/3/1/3/131398195/0c3d2.pdfIn PDF document text
    • http://emperorscleaners.com/uploads/1/3/0/6/130605048/powug-nizureb.pdfIn PDF document text
    • http://smartsell.work/uploads/1/3/1/4/131437779/b4323c62ff501df.pdfIn PDF document text
    • http://skycoinfiber.com/uploads/1/3/0/4/130488698/wajosivesav_xurudiji.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
    • 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_off000096c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96C8 16096 bytes
SHA-256: 1884097594f7737fdcf2bc89213788447ee6610976719dfa953483641b1752c7
font_01_sfnt_off0000c8d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8D4 16204 bytes
SHA-256: c988415812f594187b0a0ed75dc52802e798e1695b49bd300f8412a65040a449

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