Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2437e8fd832358d…

MALICIOUS

PDF

50.2 KB Created: 2020-03-29 05:11:26 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 4a822f58206e3af2f8582bd96ef0a7a9 SHA-1: bff9729ed5a20534a7d75cc578fa49bacf5fd4b1 SHA-256: e2437e8fd832358d78b7b7be1d03031fcf729d785bed1b4a02b8beb5bd08854a
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The document body text, though partially corrupted, includes a URL that points to a document titled 'Reglamento de la escuela secundaria tecnica numero 36'. The primary function appears to be directing users to a network of websites, likely for SEO spam or to host further malicious content.

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://mx.grandsalinelibrary.com/uploads/1/3/0/7/130740524/130740524.html#reglamento+de+la+escuela+secundaria+tecnica+numero+36 PDF link annotation
    • http://interview-tools.net/uploads/1/3/0/6/130603737/medosu_lepopulobipija.pdfIn PDF document text
    • http://superiorcouplingssealants.com/uploads/1/3/0/2/130287553/ririnizevawa-mejevokibo.pdfIn PDF document text
    • http://tazia.org/uploads/1/3/1/0/131070376/wifowesadez_suzobetapu.pdfIn PDF document text
    • http://africanretreats.com/uploads/1/3/0/7/130739597/putowipebonelab-xabate-xavawezekel-lirarosu.pdfIn PDF document text
    • http://www.greywolfpestcontrol.ca/uploads/1/3/0/7/130739238/483a30544.pdfIn PDF document text
    • http://alexbeeler.com/uploads/1/3/0/4/130483479/rezisizar_kobujuwopi_xorewekaka.pdfIn PDF document text
    • http://michifuzz.com/uploads/1/3/0/2/130272955/2880632.pdfIn PDF document text
    • http://brightenglish.net/uploads/1/3/0/7/130776810/rajakepiso-tesenu.pdfIn PDF document text
    • http://meredithfeinman.com/uploads/1/3/0/4/130436271/048d6369c7.pdfIn PDF document text
    • http://slowmoversbayarea.com/uploads/1/3/0/5/130588336/getemuluzumop-tesutoju-poluterulumo-nenubutereb.pdfIn PDF document text
    • http://dementiafriendlycapecod.org/uploads/1/3/0/7/130775813/kexudezano_gezinumesuwom_sokogiz_kafikaforaxi.pdfIn PDF document text
    • http://gohango.org/uploads/1/3/0/4/130477882/2237baa73bd.pdfIn PDF document text
    • http://www.dadgumoutdoors.com/uploads/1/3/0/5/130551677/f9a35.pdfIn PDF document text
    • http://pharmaloq.net/uploads/1/3/0/4/130435695/5583567.pdfIn PDF document text
    • http://buyhempoilnow.shop/uploads/1/3/0/6/130639720/1777276.pdfIn PDF document text
    • http://mybiohelp.com/uploads/1/3/0/6/130622061/958267.pdfIn PDF document text
    • http://unitedmortgageandfinance.com/uploads/1/3/0/3/130313022/galonejope.pdfIn PDF document text
    • http://cornerstonejkc.com/uploads/1/3/0/6/130604196/kusum.pdfIn PDF document text
    • http://www.undobat.com/uploads/1/3/0/6/130621682/bupixige.pdfIn PDF document text
    • http://tiptoppronos.net/uploads/1/3/0/4/130476298/rigepasago.pdfIn PDF document text
    • http://atimelyfit.com/uploads/1/3/0/7/130775820/2034222.pdfIn PDF document text
    • http://paulbrownierealtor.com/uploads/1/3/0/3/130313671/3172128.pdfIn PDF document text
    • http://konzacoffeecompany.com/uploads/1/3/0/7/130775823/sisigegimisug_gasux.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_off000081b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81B2 9888 bytes
SHA-256: 6f23bf4501eb4d7aae61fabf9fcb79ef57d620a9421a3d31d093516f94fdf486
font_01_sfnt_off0000a508.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA508 16036 bytes
SHA-256: 779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63

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