Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2d80fb859a92bc2…

MALICIOUS

PDF

40.7 KB Created: 2020-04-01 21:32:33 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 0b6021e3a9b01dac579ae84737f7d721 SHA-1: 70244adc10a5c4b19b070bb7030c4a939c283c58 SHA-256: e2d80fb859a92bc2942f39dfdbed57609ca26b71187650979659928687db912a
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF document contains a large number of external links, many of which point to other PDF files with numeric slugs, suggesting a link farm for SEO manipulation or to host malicious content. One prominent link, 'http://smithsjoinery.com/uploads/1/3/1/4/131407876/131407876.html#denzel+curry+32+zel+download', appears to be a lure for a file download. The ML classifier strongly indicated maliciousness, supporting the interpretation of this document as a malicious lure.

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://smithsjoinery.com/uploads/1/3/1/4/131407876/131407876.html#denzel+curry+32+zel+download
    • http://deana1.com/uploads/1/3/0/5/130588762/8556427.pdf
    • http://futurecitywny.org/uploads/1/3/0/5/130545684/nimonazemis-dipefatalofi-weduvemefuwivu-doxagat.pdf
    • http://dorjeetseringnang.com/uploads/1/3/0/6/130604744/lobimuw.pdf
    • http://portfolioaabha.com/uploads/1/3/0/4/130477131/e2849089eb.pdf
    • http://74-123-76-169.mgwnet.com/uploads/1/3/0/4/130477192/7080820.pdf
    • http://kisservicing.com/uploads/1/3/0/6/130621485/de28e.pdf
    • http://urban-ani.me/uploads/1/3/0/2/130289682/rutaxepopes-bosokono-rilubozu.pdf
    • http://mhlansdalellc.com/uploads/1/3/1/4/131413550/nuzum-lomuwitezujez-xovuzakifat-tapugoveda.pdf
    • http://genderinnovation.com/uploads/1/3/0/4/130476229/banepitofijedava.pdf
    • http://gurveshkaur.com/uploads/1/3/0/7/130776356/rebasijotata_pogoxibenoge_vibanikise.pdf
    • http://9f60hmh065.com/uploads/1/3/0/7/130740244/sajajigufefo_bukepuduxote_wakevepugig_zixewuxo.pdf
    • http://comofracasarenlosestadosunidos.com/uploads/1/3/0/2/130273982/wibuf.pdf
    • http://fisherwear.com/uploads/1/3/0/7/130776031/menev.pdf
    • http://bellaspeechsensoryworldinc.com/uploads/1/3/0/6/130621569/369d9c.pdf
    • http://yeshuapathway.org/uploads/1/3/0/6/130620450/sorubis_basub.pdf
    • http://aldertonproperties.com/uploads/1/3/0/2/130272580/gigoduje_wisunobo_vojaz.pdf
    • http://kyterapia.com/uploads/1/3/0/2/130270746/safev-gotit-fupixajabepimut-voputik.pdf
    • http://vibrandoluzeventos.com/uploads/1/3/0/7/130738765/vanotobozilavav_zigifukesolo_lelenof_gozovuxijimo.pdf
    • http://vjvaughn.com/uploads/1/3/1/0/131070761/9467323.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000765f.bin
bc4da2477fd1c2e58f43c852113625be2a8c33cf8f415abb0011f88016e00779		 pdf-font-stream PDF embedded font (sfnt) at offset 0x765F 7476 bytes

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