Malicious PDF — malware analysis report

Static analysis result for SHA-256 85d8fa0cea5c4932…

MALICIOUS

PDF

75.9 KB Created: 2020-03-09 06:00:26 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: ad51a62a6acf251b957f238741db09cd SHA-1: 5c3b07f25ef50f7c4140457bffde160cf9bf7160 SHA-256: 85d8fa0cea5c4932d93530caadde978a9b9904163507931dd5afc5f2a7f4aa12
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or SEO manipulation tactic. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of numerous external URLs indicates a potential for distributing further malicious content or redirecting users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://vera-b.pleasingfood.com/uploads/1/3/0/6/130604044/130604044.html#pathogenicity+of+fasciola+hepatica+pdf PDF link annotation
    • http://back2balancenursing.com/uploads/1/3/0/9/130969562/mefegifelaxeg.pdfIn PDF document text
    • http://coleinvestigations.com/uploads/1/3/0/6/130604824/somatadiz.pdfIn PDF document text
    • http://persucarhipa.net/uploads/1/3/0/5/130589047/4665445.pdfIn PDF document text
    • http://mx.wenonahlibrary.com/uploads/1/3/0/5/130590420/lowav_wudugiwar_fuwifuka_kakiwenogopuz.pdfIn PDF document text
    • http://www.faderstudio.net/uploads/1/3/0/5/130588999/7f2153d4.pdfIn PDF document text
    • http://secondstoreyhoney.com/uploads/1/3/0/8/130874426/nibozizutegigav.pdfIn PDF document text
    • http://universalcitytreeservices.com/uploads/1/3/0/7/130775862/5641757.pdfIn PDF document text
    • http://www.zgunrack.com/uploads/1/3/0/6/130604863/c1c62fb117894.pdfIn PDF document text
    • http://www.creepyheadshop.com/uploads/1/3/0/7/130775219/4a197c30.pdfIn PDF document text
    • http://noblevisioncenter.net/uploads/1/3/0/7/130775752/jowivozujux.pdfIn PDF document text
    • http://bridlewiseridingacademy.com/uploads/1/3/0/8/130874678/notovekopa.pdfIn PDF document text
    • http://allnetvideoandphotography.com/uploads/1/3/0/9/130969508/3a897.pdfIn PDF document text
    • http://mail.villagevetpa.net/uploads/1/3/0/8/130873779/fesorer_bifoguvomofaneb_jejoketuni.pdfIn PDF document text
    • http://www.worldtrailblazers.net/uploads/1/3/0/6/130622111/gawebofe.pdfIn PDF document text
    • http://marijuanaexchangemarket.com/uploads/1/3/0/4/130476396/6527249.pdfIn PDF document text
    • http://localfixclinic.com/uploads/1/3/0/4/130435722/01a7d8173ff0314.pdfIn PDF document text
    • http://helicoreservices.com/uploads/1/3/0/6/130639300/4145025.pdfIn PDF document text
    • http://www.sagesmudgespray.com/uploads/1/3/0/5/130544390/dinovedadulobenud.pdfIn PDF document text
    • http://friendsoftoussaint.org/uploads/1/3/0/5/130546040/2873f8d2.pdfIn PDF document text
    • http://alchemywebdesign.ca/uploads/1/3/0/4/130489082/d3105345c.pdfIn PDF document text
    • http://www.independentautomotive.net/uploads/1/3/0/5/130538987/2547755.pdfIn PDF document text
    • http://thesingbabysingshow.com/uploads/1/3/0/4/130489536/janeg.pdfIn PDF document text
    • http://yhwhsc.com/uploads/1/3/0/5/130548070/2d7c0a4f8b.pdfIn PDF document text
    • http://pkuehne.de/uploads/1/3/0/6/130639901/dexim.pdfIn PDF document text
    • http://reachlearning.net/uploads/1/3/0/6/130604458/lavirasijezeresal.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
🗂 Part of campaign: mikkiscreations.shop 4 samples

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000deb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEB8 9896 bytes
SHA-256: af489cfb4ba9c448899bb5a7b5f3f0e18269292f386312e2dfe684ded7af2c4c
font_01_sfnt_off0001024d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1024D 2600 bytes
SHA-256: 41d5c9cb4d60b7530e3cfd93a78efd430fe179aa57a8296e74fb8a971da4b0ee
font_02_sfnt_off00010b76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B76 16036 bytes
SHA-256: b3affdfdfee497c2d3230853582529cf395d265bfdbb8cde7d84ae9c33602211