Malicious PDF — malware analysis report

Static analysis result for SHA-256 336744cb57e760aa…

MALICIOUS

PDF

41.9 KB Created: 2020-03-22 07:54:42 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-08-10
MD5: bff840f30d93ecc642ba311371901f17 SHA-1: b23208e21f11dc375a8ca25be40e4d1b4434250f SHA-256: 336744cb57e760aaeac9da7d47f86f408798363217d3ae92fb94c8fada516013
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDF files hosted on various domains. This behavior is indicative of a link farm designed to manipulate search engine rankings or distribute malicious content. The ML classifier strongly supports the malicious nature of this PDF. No scripts were extracted, and the document body is heavily obfuscated.

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://house-2homeinspections.com/uploads/1/3/0/8/130814226/130814226.html#buffalo+restore+amherst+st PDF link annotation
    • http://www.uceplus.com/uploads/1/3/0/2/130274343/likodedujoforebaxeze.pdfIn PDF document text
    • http://ohiocomfortandcraft.com/uploads/1/3/0/7/130739763/6212838.pdfIn PDF document text
    • http://www.banjarkids.com/uploads/1/3/0/8/130814341/4b9585ceb.pdfIn PDF document text
    • http://juridicorapido.com/uploads/1/3/0/7/130740438/f7f44fa845.pdfIn PDF document text
    • http://nicollaslittleshop.com/uploads/1/3/0/4/130483491/kemezeralevamer-nekosote.pdfIn PDF document text
    • http://calkni.com/uploads/1/3/0/6/130621132/zopozorevavu.pdfIn PDF document text
    • http://blankamelbostad.com/uploads/1/3/0/5/130541661/8b56967c0.pdfIn PDF document text
    • http://garyroybird.com/uploads/1/3/0/5/130551654/woniledudisor.pdfIn PDF document text
    • http://theandrewfamilytree.com/uploads/1/3/0/6/130604269/c4cd058296a0b8.pdfIn PDF document text
    • http://judaicabyjimcohen.com/uploads/1/3/0/6/130621575/vilunidizekuzi_semijoruwedos_xuzazuwib.pdfIn PDF document text
    • http://babiesinbrooklyn.com/uploads/1/3/0/6/130639590/a3f3bff.pdfIn PDF document text
    • http://ctsolitfoundation.com/uploads/1/3/0/2/130272470/mopelagow.pdfIn PDF document text
    • http://hostmaster.va-instrument.se/uploads/1/3/0/5/130589103/maxunub.pdfIn PDF document text
    • http://dontforgetyourluggage.com/uploads/1/3/0/7/130775583/9359430.pdfIn PDF document text
    • http://michianawomeninconstruction.com/uploads/1/3/0/5/130542875/werola.pdfIn PDF document text
    • http://latviancontent.com/uploads/1/3/0/6/130605347/tibelaledotelolugij.pdfIn PDF document text
    • http://curatecolor.com/uploads/1/3/0/6/130639982/6873333.pdfIn PDF document text
    • http://www.ekogren.nl/uploads/1/3/0/6/130620607/0b3ea1d0.pdfIn PDF document text
    • http://twoharborslakesidemarket.com/uploads/1/3/0/5/130539130/9680de.pdfIn PDF document text
    • http://tradingblockpro.net/uploads/1/3/0/5/130590273/8063555.pdfIn PDF document text
    • http://buysomethingscary.com/uploads/1/3/0/9/130969249/veneruxiwu-kunaxiluxa-vakewozisowino-dutelinikuva.pdfIn PDF document text
    • http://www.jasonsalmons.com/uploads/1/3/0/5/130551697/0e5199b.pdfIn PDF document text
    • http://599-bonus.site/uploads/1/3/0/4/130435702/9984685.pdfIn PDF document text
    • http://minatangoboutique.com/uploads/1/3/0/2/130273738/7569abaade1.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

Related samples 4

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

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000079d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79D1 8284 bytes
SHA-256: b29c72e6c4cb93d2a24da04925fafb02543d9697ac9aa94fa309a710ac2bf942

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