Malicious PDF — malware analysis report

Static analysis result for SHA-256 0380124c12be5c46…

MALICIOUS

PDF

49.2 KB Created: 2020-03-29 07:24:34 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: cd9fe736bedd865e803e8e0a8f2e7fd4 SHA-1: 1ac5cf94fb96a7ce82e3f4c5d52ce9cfb473f276 SHA-256: 0380124c12be5c46ab600a148c65b4ae0f0a7c29aa07e4173279e821b9d64e43
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. The ML classifier also strongly indicated maliciousness. These links likely serve to redirect users to malicious websites or to manipulate search engine rankings, a common tactic for distributing malware or phishing content. No scripts were extracted, and the document body was heavily obfuscated, making it difficult to determine the exact payload.

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://miracleinabucket.com/uploads/1/3/0/7/130776575/130776575.html#how+much+developer+to+use+with+loreal+hicolor+magenta
    • http://mutethiajuniorschool.com/uploads/1/3/0/4/130476866/gogubomenuwuf.pdf
    • http://riverside-cottage-cornwall.co.uk/uploads/1/3/1/0/131071220/wakix-golivajulamala.pdf
    • http://coachharrisbiologywebsite.com/uploads/1/3/0/2/130288962/71e358bee2bc620.pdf
    • http://sallysfitnessfortress.com/uploads/1/3/0/4/130488934/6753615.pdf
    • http://whiteravenmedia.com/uploads/1/3/0/6/130604556/9164ae6b96.pdf
    • http://hydrashieldwater.com/uploads/1/3/0/9/130969973/nezelovitarow-puvigexo-bixafose-keniduxebeguke.pdf
    • http://jaysconstructionllc.com/uploads/1/3/0/9/130969536/sovek-sijomuxoduwi-wotonoge-zopoxugovover.pdf
    • http://www.gatewayglobaldl.com/uploads/1/3/0/2/130287281/gawutokeden_gowiwotapaxed_rirudaguzo_rabovaf.pdf
    • http://howtosurvive180daysofhell.com/uploads/1/3/0/6/130640235/sepazobuni-debilegak-jezovidewuv-zowedi.pdf
    • http://ghmotteronline.com/uploads/1/3/0/7/130776182/d0ae2d35ffe7cb.pdf
    • http://sandiegorealestateconcierge.com/uploads/1/3/0/2/130272851/dagososorezolobap.pdf
    • http://hersheypetfood.com/uploads/1/3/0/7/130775928/6821583.pdf
    • http://real-broker.net/uploads/1/3/0/5/130551369/xubanivudolemiwekat.pdf
    • http://speechtherapysupport.com/uploads/1/3/0/8/130813849/jufenaxepofixofomot.pdf
    • http://societyforemployeerelations.net/uploads/1/3/0/8/130814931/julimoxi.pdf
    • http://vettedveteran.us/uploads/1/3/1/1/131164223/pobekusezixina.pdf
    • http://www.bestroundrockcriminaldefense.com/uploads/1/3/0/2/130270917/2203882.pdf
    • http://lemurjewels.net/uploads/1/3/0/8/130874599/lavakiputafapok_wojuzokil_lizer.pdf
    • http://www.thecottonwoodhighschool.com/uploads/1/3/0/6/130621201/4394205.pdf
    • http://sunscar.net/uploads/1/3/0/5/130588230/a44661497081e.pdf
    • http://foodismedicinesc.com/uploads/1/3/0/5/130539091/dezaduwun-jasowuxofufapa-rolovizoseket.pdf
    • http://www.wanderlusteatery.com/uploads/1/3/0/6/130603980/2960004.pdf
    • http://hostmaster.dudleycameraclub.co.uk/uploads/1/3/0/4/130435654/pufimupipalumedijopo.pdf
    • http://goldlendcapital.com/uploads/1/3/0/7/130739991/0a903c702b6f.pdf
    • http://mail.veralardi.gr/uploads/1/3/0/3/130313010/xumosebumuzu_fitusuzakomo_begipato_funezebatonu.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/
    • http://www.adobe.com/).Noto
    • http://www.google.com/get/noto/http://www.adobe.com/type/This
    • http://scripts.sil.org/OFLNoto

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000880c.bin
8b9ead955fee4e8bd3a6b6626e9fc175bae83f9f426e8cc20596e69a729e1077		 pdf-font-stream PDF embedded font (sfnt) at offset 0x880C 8084 bytes
font_01_sfnt_off0000a758.bin
885781ec91db75dc8c4a6a3d3dac0324bdfdb8f2239dab70466c62035ae072da		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA758 4144 bytes

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