Malicious PDF — malware analysis report

Static analysis result for SHA-256 53350efadcc50c0e…

MALICIOUS

PDF

61.3 KB Created: 2020-03-19 12:46:28 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 930b24dc5c04c138096521d430660257 SHA-1: af7e8c43ab74041cdcc491616a1a08b43cbec001 SHA-256: 53350efadcc50c0eaf86c9803bdae9f59447fc4dc7c41e6c42212994858d79a4
96 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links to external websites, a technique often used for SEO spam or to redirect users to malicious content. The document body, though heavily obfuscated, contains text related to massage therapy, suggesting a lure. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of generated links, reinforcing the SEO spam or redirection hypothesis. No scripts were extracted from this sample.

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://bshppopup.com/uploads/1/3/0/4/130483649/130483649.html#peace+of+mind+massage+therapy+blackwood+nj PDF link annotation
    • http://ncbestsigns.com/uploads/1/3/0/4/130483364/5677142.pdfIn PDF document text
    • http://www.eco-worrier.net/uploads/1/3/0/7/130739347/af01fac728b8cf.pdfIn PDF document text
    • http://sno-ops.org/uploads/1/3/0/4/130436399/d8b30300940012f.pdfIn PDF document text
    • http://melfrisee.com/uploads/1/3/0/6/130604300/8633099.pdfIn PDF document text
    • http://creativeimages.studio/uploads/1/3/0/6/130639152/9233245.pdfIn PDF document text
    • http://gradientwm.com/uploads/1/3/0/7/130739744/zikar.pdfIn PDF document text
    • http://www.larkandfowl.com/uploads/1/3/0/7/130740178/6612719.pdfIn PDF document text
    • http://taurum.ch/uploads/1/3/0/7/130739597/3132d020.pdfIn PDF document text
    • http://nileshsp.com/uploads/1/3/0/6/130620340/zaronivadufemenuva.pdfIn PDF document text
    • http://monartisticpet.com/uploads/1/3/0/4/130476348/b014bff81cb.pdfIn PDF document text
    • http://perfusionexpert.com/uploads/1/3/0/9/130969449/vojenup.pdfIn PDF document text
    • http://huangjiayulezhinan.br3h.com/uploads/1/3/0/9/130969335/javoribosa_jolovafit_fanapagige.pdfIn PDF document text
    • http://gigivangos.com/uploads/1/3/0/5/130551053/rupusi_larizore_lopilupova.pdfIn PDF document text
    • http://tedburden.com/uploads/1/3/1/0/131071288/f24926ea4d5d.pdfIn PDF document text
    • http://beesea.com/uploads/1/3/0/6/130620154/faselinisifazefofa.pdfIn PDF document text
    • http://aubreyequinn.com/uploads/1/3/0/5/130540246/gavadimililogat.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 1

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E7E 8704 bytes
SHA-256: d96da1e859bfe23a60c385d449e617699a43b909bb7def241bce28cc10501955
font_01_sfnt_off00008f9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F9D 26656 bytes
SHA-256: bb97e663bafc24add1fc517603531280b24f0eea5ab3a0fbecabb2edf5c110c0
font_02_sfnt_off0000ce05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE05 16840 bytes
SHA-256: 3d64d9f341d8077524bdd82b6e443366dfaaa6bf3e481e8460f9c23327aea100

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