Malicious PDF — malware analysis report

Static analysis result for SHA-256 425c25c7071e8735…

MALICIOUS

PDF

37.0 KB Created: 2020-03-10 14:02:35 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e2b79298efb41a67460540484e453589 SHA-1: 0bfd758ec04bed42525e787506bd147d618f7443 SHA-256: 425c25c7071e8735fc1d455de03079b2938b618107477c927c771af79092bcba
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 pointing to various domains, many of which appear to be part of an SEO link farm. The ML classifier strongly indicated maliciousness. The primary attack pattern involves directing users to a network of potentially malicious or spam-related websites through these embedded links.

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://dces9.salon225.com/uploads/1/3/0/4/130489149/130489149.html#google+language+converter+chinese+to+english
    • http://supplementbottles.com/uploads/1/3/0/6/130604923/fa0b1b3.pdf
    • http://schaeferfamilylobsterfeed.com/uploads/1/3/0/7/130739316/ca3dc6.pdf
    • http://motorcyclespeakers.org/uploads/1/3/0/8/130874153/kipife.pdf
    • http://mail.datibike.com/uploads/1/3/0/9/130969229/debeziz.pdf
    • http://oldschooldinners.com/uploads/1/3/0/7/130776077/zasuf.pdf
    • http://389summerave.com/uploads/1/3/0/2/130287881/zuzinirawirugub_tadojililig.pdf
    • http://bonitabonanza.com/uploads/1/3/0/6/130639400/607d64fd9c804.pdf
    • http://nativenationarts.com/uploads/1/3/0/6/130621043/vonugibavuvefon.pdf
    • http://micsaklaw.com/uploads/1/3/0/7/130738759/576896c343.pdf
    • http://nataliekasdan.com/uploads/1/3/0/5/130588384/8867559.pdf
    • http://geniuspath.ai/uploads/1/3/0/7/130739351/nuvesenijidiguxepek.pdf
    • http://www.lasacolombia.com/uploads/1/3/0/7/130775959/872399.pdf
    • http://restorationcommunitychurchbc.org/uploads/1/3/0/2/130289765/kejuwexe.pdf
    • http://dlitefullgifts.com/uploads/1/3/0/7/130775837/botep-nokelixave-xutodage.pdf
    • http://vegandoctor.org/uploads/1/3/0/6/130622025/1044ab14f5.pdf
    • http://ultimatehire.org/uploads/1/3/0/6/130621096/rodoxizosesirotagega.pdf
    • http://alchemy-designstudio.com/uploads/1/3/0/4/130489143/lunokeluketof.pdf
    • http://eva7skincare.com/uploads/1/3/0/2/130287261/pirinojage.pdf
    • http://mta-sts.mx.davisairrepair-nwa.com/uploads/1/3/0/6/130639508/dd9dac9bde87951.pdf
    • http://midwestcraftshows.com/uploads/1/3/0/2/130271073/gorodelefedebap.pdf
    • http://beacondesigns.net/uploads/1/3/0/7/130775828/5139d7ec45c374a.pdf
    • http://okashi.be/uploads/1/3/0/6/130639068/vulimegiwires-dapala-tufejinalelixu-lezasegujil.pdf
    • http://www.hoboannie.com/uploads/1/3/0/8/130814020/2875692.pdf
    • http://theantilogy.com/uploads/1/3/0/7/130739043/2219109.pdf
    • http://madskillzsports.info/uploads/1/3/0/6/130639554/1156637.pdf
    • http://theantilogy.com/uploa
    • 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_off0000681a.bin
4aae5f1a90370c2474604f0406d498ae9d5bba4a9aa6084eca315078a94cee9a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x681A 7544 bytes

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