Malicious PDF — malware analysis report

Static analysis result for SHA-256 bea850e4bab9e068…

MALICIOUS

PDF

96.0 KB Created: 2020-03-11 04:57:53 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 492cfd6d0098f24998f23fd0b6265f54 SHA-1: 9bbb307af575da6969dea220739b8a1ef3c6fc0f SHA-256: bea850e4bab9e068463be160884e86a7a6c479a83b88ff27d5f82e553d7b4e62
136 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to PDF files on various domains. The document body also contains a direct link to a URL that appears to be a lure for downloading a film. This suggests a link farm or SEO poisoning tactic to drive traffic to malicious content. No scripts were extracted, limiting the analysis of direct payload delivery mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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-63-204-18-33.benefitplans.org/uploads/1/3/0/9/130969985/130969985.html#download+film+akeelah+and+the+bee PDF link annotation
    • http://cookedwithhart.com/uploads/1/3/0/5/130588988/6389822.pdfIn PDF document text
    • http://mgmtinsight.net/uploads/1/3/0/2/130272365/49b1a713b.pdfIn PDF document text
    • http://cherrycreekcheer.com/uploads/1/3/0/6/130621165/panigibavitewewape.pdfIn PDF document text
    • http://www.usfleetandlease.com/uploads/1/3/0/6/130639668/0486592498c16b.pdfIn PDF document text
    • http://lauragrillo.com/uploads/1/3/0/5/130540405/dusoraxom-vumesesine.pdfIn PDF document text
    • http://cpsaltlakecity.com/uploads/1/3/0/2/130288909/9270898.pdfIn PDF document text
    • http://cpanel.kathrynrobertson.co.nz/uploads/1/3/0/7/130739093/5620880.pdfIn PDF document text
    • http://www.shopdorothys.com/uploads/1/3/0/7/130740561/rimebike.pdfIn PDF document text
    • http://dragonwearables.com/uploads/1/3/0/5/130538941/d22d250d838ac46.pdfIn PDF document text
    • http://mooretre.com/uploads/1/3/0/6/130604667/balofezufolerelenize.pdfIn PDF document text
    • http://www.boasa.org.uk/uploads/1/3/0/3/130313188/b556656a1af3140.pdfIn PDF document text
    • http://healthinformationcentre.net/uploads/1/3/0/4/130477193/3175673.pdfIn PDF document text
    • http://nmpstag.com/uploads/1/3/0/5/130540504/kogowakofa-riwidoxizof.pdfIn PDF document text
    • http://mrjrealtalk.com/uploads/1/3/0/2/130291624/fuselateveturirori.pdfIn PDF document text
    • http://thebirthofchrist.com/uploads/1/3/0/6/130604560/dofotos-rikemafojiru-vojuvedibewel.pdfIn PDF document text
    • http://www.wa-statewide-leadership.org/uploads/1/3/0/5/130543684/jukobavuvajat.pdfIn PDF document text
    • http://datadrivenacademy.online/uploads/1/3/0/7/130739814/pewoli.pdfIn PDF document text
    • http://songarts.com/uploads/1/3/0/4/130435622/dinufevalax_tobewo.pdfIn PDF document text
    • http://topcincinnatibeautysalontraining.com/uploads/1/3/0/3/130313468/rovolifiredi.pdfIn PDF document text
    • http://xinhaoboyayulechengguanfangwangzhan.br3h.com/uploads/1/3/0/3/130323697/5f3e34.pdfIn PDF document text
    • http://hidefdjs.com/uploads/1/3/0/7/130738881/juwelufubagarobug.pdfIn PDF document text
    • http://goodsamrehabilitation.org/uploads/1/3/0/9/130968934/318a52c7d9bcee.pdfIn PDF document text
    • http://jalanibeautybar.com/uploads/1/3/0/6/130604642/1216608.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000142da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142DA 9896 bytes
SHA-256: 1a627b02166e9c3ca2302ea7303cb81c60a78f72a70e71a00dba17b655ccd533
font_01_sfnt_off0001679d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1679D 2600 bytes
SHA-256: 41d5c9cb4d60b7530e3cfd93a78efd430fe179aa57a8296e74fb8a971da4b0ee