Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6275910bf338d24…

MALICIOUS

PDF

45.2 KB Created: 2020-03-29 02:42:06 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-07
MD5: 8cd35c943083ec6b9330125dbcb4b1fa SHA-1: 895de45d235989b284012b5f864e9e67468c07b8 SHA-256: b6275910bf338d24c3727e3eae9430f77b38952742bd06922c3eeda1c112d40f
136 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a PDF link farm. These links point to various PDF files hosted on different domains, suggesting a tactic to manipulate search engine results or distribute further malicious content. The primary URL identified is http://adsl-63-204-18-59.benefitplans.org/uploads/1/3/1/1/131164398/131164398.html#midsummer+night%27s+dream+national+theatre+cast, which itself appears to be part of this distribution network.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://adsl-63-204-18-59.benefitplans.org/uploads/1/3/1/1/131164398/131164398.html#midsummer+night%27s+dream+national+theatre+cast PDF link annotation
    • http://rgsidewalkart.com/uploads/1/3/0/3/130379172/negapuv-mipinaginu-kezabokowojori.pdfIn PDF document text
    • http://mikeflattdesign.com/uploads/1/3/0/7/130739652/lixuma-nobomifuwedim-databup.pdfIn PDF document text
    • http://nordicinternational.net/uploads/1/3/0/5/130588624/2663308.pdfIn PDF document text
    • http://minjukim.com/uploads/1/3/0/2/130288307/3190378.pdfIn PDF document text
    • http://angelssandlot.com/uploads/1/3/0/7/130775752/noxobodaza-fuvusewezaso.pdfIn PDF document text
    • http://www.chestnutridgefinancialservicesllc.com/uploads/1/3/0/4/130483509/wixafumukiw.pdfIn PDF document text
    • http://fundacionanawin.org/uploads/1/3/0/7/130739416/bipajatim.pdfIn PDF document text
    • http://creapoponline.com/uploads/1/3/0/4/130489898/zofezivagen_zasawusa_zarowusukipu.pdfIn PDF document text
    • http://smithsystems.us/uploads/1/3/0/8/130813787/zoxevilaza.pdfIn PDF document text
    • http://redlistapps.com/uploads/1/3/0/9/130969062/d4a500.pdfIn PDF document text
    • http://wwwregion24em.com/uploads/1/3/0/7/130775965/3615629.pdfIn PDF document text
    • http://webmail.ev-resource.com/uploads/1/3/1/0/131069838/vowovapuno_xupufurufamak_wupotit.pdfIn PDF document text
    • http://vividuspainting.com/uploads/1/3/0/6/130639668/kogeb.pdfIn PDF document text
    • http://gufovacanze.com/uploads/1/3/0/7/130738924/03b434b10c8b55.pdfIn PDF document text
    • http://brandon3d.com/uploads/1/3/0/4/130476632/takubadi_zifexewesevu_felajelugo_gexevij.pdfIn PDF document text
    • http://4midableimagery.com/uploads/1/3/0/5/130588957/rizan-nalaxuteba-xiwamene.pdfIn PDF document text
    • http://www.belovedartnz.com/uploads/1/3/0/7/130739654/tudukonudije_keketili_lejavuged_kodiw.pdfIn PDF document text
    • http://foundhomedecor.com/uploads/1/3/0/4/130489627/3291664.pdfIn PDF document text
    • http://barleygardening.org/uploads/1/3/0/6/130604025/3298250ccce5d.pdfIn PDF document text
    • http://vickersmilitary.com/uploads/1/3/1/0/131070375/retidamowuso_nitepofumen.pdfIn PDF document text
    • http://improveyouraflgoalkicking.com/uploads/1/3/0/8/130814122/cadb465.pdfIn PDF document text
    • http://nashvillerollingpinco.com/uploads/1/3/0/5/130588307/5086983.pdfIn PDF document text
    • http://phdentists.com/uploads/1/3/0/6/130639491/fobetozoduwademe.pdfIn PDF document text
    • http://www.noafconsultingservices.com/uploads/1/3/0/9/130969835/340ae23f92766.pdfIn PDF document text
    • http://goimmaculatafootball.com/uploads/1/3/0/6/130604210/vasus_voxesoletijipa_zirabuzeb_fovupakisik.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
🗂 Part of campaign: nordicinternational.net 3 samples

Related samples 8

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_off000083c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83C4 9216 bytes
SHA-256: c8b2ac628a267a7b2a53f65297a7a2ce333b9da7c16eab10fb0c773021b9edc6

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