Malicious PDF — malware analysis report

Static analysis result for SHA-256 1753d586bd67d06a…

MALICIOUS

PDF

40.0 KB Created: 2020-03-17 02:59:40 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: b8b89450d1838edff5b41f493a36ad69 SHA-1: 72877b700d9ea6214ce6d35fdc18f6edd018cfd3 SHA-256: 1753d586bd67d06aaab355ee8e85545ba83c3677a97984703c332da0c3994b9a
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1190 Exploit Public-Facing Application

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The document body, though partially corrupted, contains a URL that matches one of the extracted links. This suggests the primary purpose is to redirect users to a network of websites, potentially for SEO spam or to host further malicious content. 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://theartofphotography.ca/uploads/1/3/0/2/130287945/130287945.html#multiplicacion+y+division+de+los+numeros+racionales
    • http://tapcharms.com/uploads/1/3/0/4/130483565/6489859.pdf
    • http://corridormanchester.com/uploads/1/3/0/5/130543539/gefefemanod_visojapubuja_sepab_pubek.pdf
    • http://jerichoroadonline.com/uploads/1/3/0/4/130489097/c0364.pdf
    • http://goss-p.com/uploads/1/3/0/7/130775654/4478832.pdf
    • http://coloradocommunitycompost.com/uploads/1/3/0/6/130605072/f84b27ba.pdf
    • http://cdn.newenglandlighthouses.net/uploads/1/3/0/6/130621487/nodiluli.pdf
    • http://www.bgrahamfarrier.com/uploads/1/3/0/5/130550910/3878216.pdf
    • http://diabolickal.com/uploads/1/3/0/3/130313135/jenovitemoxidi-nikebavifev-norawi-mizatesowa.pdf
    • http://davidmarquesibanez.com/uploads/1/3/0/8/130815031/tituk_sewudosapunewu_jilinide_gadurowowesunu.pdf
    • http://concretecuttingloganut.com/uploads/1/3/0/8/130874424/xigujawetemuwun-xedezop-wedulajul-woriw.pdf
    • http://westbridgecorp.com/uploads/1/3/0/8/130813987/7736282.pdf
    • http://ellementproduce.com/uploads/1/3/0/5/130588282/pewaderoladirijoke.pdf
    • http://balboaislandrealtor.com/uploads/1/3/0/6/130639922/2540039.pdf
    • http://webmail.lambersfisher.com/uploads/1/3/0/5/130588692/1274246.pdf
    • http://arizonapeteuthanasia.com/uploads/1/3/0/5/130551239/lulenog.pdf
    • http://www.productionairservices.com/uploads/1/3/0/2/130289601/virijevamo.pdf
    • http://cyberliabilitypro.com/uploads/1/3/0/6/130621640/zisejepi_nibowotimexiroz_nazamib.pdf
    • http://ananyais.com/uploads/1/3/1/0/131070089/wirujunujoguve-managatedisuza-xuwekaw.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_off00007189.bin
86f895d9ce9eb4ff8e954cfc02c66aee9a7c7686ff0ba854275daa88a595e1f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7189 8968 bytes

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