Malicious PDF — malware analysis report

Static analysis result for SHA-256 22a496bb4d43fd06…

MALICIOUS

PDF

39.7 KB Created: 2020-03-26 05:33:42 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 20ff75f8ab6450acb28ce34be360c56f SHA-1: 88d4c93c06ec0ba6197695d9db2cfeb8878c4d0b SHA-256: 22a496bb4d43fd0607707479225b382071c7174438e5cc9289f9b7fd3e693f38
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links to other PDF files hosted on various domains. This technique is often used for SEO poisoning to manipulate search engine results or to distribute a large volume of malicious content. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the suspicious linking behavior. 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://madameboutique.net/uploads/1/3/0/6/130639956/130639956.html#sunbeam+premium+quilted+heated+mattress+pad+cal+king
    • http://glacieraero.org/uploads/1/3/0/5/130588973/6858946.pdf
    • http://smuphideltatheta.com/uploads/1/3/0/4/130476447/1384205.pdf
    • http://nurturingnursery.com/uploads/1/3/0/6/130603942/fefafolejalanujogadu.pdf
    • http://mail.ontwerp-onderzoek.eu/uploads/1/3/0/6/130604010/wezoberume.pdf
    • http://viakconsultingllc.com/uploads/1/3/0/8/130873820/sisumujetejulezar.pdf
    • http://glammasgifts.net/uploads/1/3/0/5/130588279/moxutedituru.pdf
    • http://theorchardatchesfield.co.uk/uploads/1/3/0/7/130775701/mojisalekut.pdf
    • http://www.lawlessness-tour.com/uploads/1/3/0/5/130588902/wasili-mozojized-tesipemejivu.pdf
    • http://mta-sts.mail.lovegreekislands.com/uploads/1/3/0/3/130313718/wonesenededen.pdf
    • http://petercolettiproperties.com/uploads/1/3/0/7/130740363/xanonovenatel.pdf
    • http://denverdeckandfence.com/uploads/1/3/0/4/130476045/2380553.pdf
    • http://morrisagent.net/uploads/1/3/0/7/130739288/489208.pdf
    • http://webmail.klmlaw.com/uploads/1/3/0/5/130545260/2785992.pdf
    • http://bandstreamtv.com/uploads/1/3/0/6/130621322/7420812.pdf
    • http://bainversion.com/uploads/1/3/0/6/130639976/2159270.pdf
    • http://edenrosepapery.com/uploads/1/3/0/5/130540282/pifijixovewapu.pdf
    • http://villa-del-rio.com/uploads/1/3/0/4/130436074/lujelubada_fojugodevu_fixivelarebozo_pirotenefupoje.pdf
    • http://mta-sts.mail.lyndatongue.com/uploads/1/3/0/4/130483684/tiwogeg_xabinibezem.pdf
    • http://mindbodypsychology.net/uploads/1/3/0/6/130621402/kudokelodid_jonorofosar_vukofebasigad_kigewosugani.pdf
    • http://ccwdevelopment.info/uploads/1/3/0/6/130639719/kaloluvutipixu.pdf
    • http://thegoodnewsgarden.com/uploads/1/3/0/6/130620365/2244190.pdf
    • http://www.cryptofistbump.com/uploads/1/3/0/6/130604369/2301807.pdf
    • http://winningwithservice.com/uploads/1/3/0/2/130289430/66927834.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_off000073f3.bin
c2de2000dbea618dc13d8d83221dcaf4238d388f39638ac2c33d540f8d3a2e4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73F3 7436 bytes

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