Malicious PDF — malware analysis report

Static analysis result for SHA-256 6266487bb5964956…

MALICIOUS

PDF

35.6 KB Created: 2020-05-20 09:45:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bc1a275de7a538b7d92c855d52134ccf SHA-1: 98e36acc99644f12651464029339dfd303aff1cf SHA-256: 6266487bb5964956cfee72fe68247bf4df9ad83171a94eda367aaf91cb0badb4
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, identified as a link farm, suggesting a SEO spam or content hosting purpose. The ML classifier also flagged this PDF as malicious with high confidence. While no scripts were directly extracted, the PDF structure and embedded links indicate a malicious intent to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://amnqualitysolutions.com/uploads/1/3/0/4/130488299/130488299.html#marsha+may+bangbus
    • http://flightrequest.org/uploads/1/3/1/8/131856105/8f4cde6.pdf
    • http://access2fun.org/uploads/1/3/0/2/130270938/5418958.pdf
    • http://cantonbiblechurch.net/uploads/1/3/0/8/130814402/fe73197f3f79622.pdf
    • http://sordito.com/uploads/1/3/0/2/130288802/2250b8e6.pdf
    • http://cupcakesbykath.com/uploads/1/3/1/3/131398313/guxonekefodemar.pdf
    • http://niskuprojects.com/uploads/1/3/1/4/131453559/vevixiwawa.pdf
    • http://stangresources.com/uploads/1/3/0/6/130620679/8352864.pdf
    • http://carpenter-lomax.com/uploads/1/3/0/5/130588286/digukufozupepikeka.pdf
    • http://moggawear.com/uploads/1/3/0/5/130588185/c10efcd17509.pdf
    • http://oatsonline.org/uploads/1/3/1/6/131607054/e77d5.pdf
    • http://thebarnonchurchstreet.com/uploads/1/3/1/6/131606046/deziwab.pdf
    • http://d2jmusic.com/uploads/1/3/0/3/130323568/2670608.pdf
    • http://lenlamensdorf.net/uploads/1/3/0/4/130435982/wataser-wevodonozi.pdf
    • http://regisrealtygroup.com/uploads/1/3/0/4/130436006/rafufomuguwu.pdf
    • http://rejuvenateyourmuscles.com/uploads/1/3/0/4/130494059/4628e.pdf
    • http://lisabrockcounseling.com/uploads/1/3/0/4/130476859/kefusubiwegem.pdf
    • http://blackcustomgolfcart.com/uploads/1/3/0/7/130740443/peruvi.pdf
    • http://salonfryzjerskibella.pl/uploads/1/3/0/4/130476880/88a1c44a7.pdf
    • http://fulton201.com/uploads/1/3/0/8/130814681/814055.pdf
    • http://fucurlife.com/uploads/1/3/0/6/130621651/sawadetuvene-lefulakovikafo-xelekugobalo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005eeb.bin
eb2559e7cda9757ab4e04f648849f081f68a8b103d0fa203858101888b4a33f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EEB 10632 bytes

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