Malicious PDF — malware analysis report

Static analysis result for SHA-256 e06e8b0f62ee4f0a…

MALICIOUS

PDF

85.4 KB Created: 2021-09-18 01:51:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 382ff8b9448da47f37e817a54d39b683 SHA-1: 17c2845ff38d9cddb1a9fdfd25a51bfeb3c09e17 SHA-256: e06e8b0f62ee4f0a2cb712814e2cd5465d89086e25dc39afa7d14736f5330d18
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was flagged by an ML classifier as malicious and contains a high number of external links, many pointing to disposable domains. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a link farm, a common tactic for SEO manipulation or distributing malicious content. While no scripts were extracted, the sheer volume of links and the ML classification suggest a malicious intent, likely related to directing users to harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 4

  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://ecohort.com/userfiles/files/86831051729.pdf In PDF document text
    • http://ramenzoni.eu/userfiles/files/noxalunipuxapimutamibowuj.pdfIn PDF document text
    • https://dongcohonda.com/userfiles/file/24949012249.pdfIn PDF document text
    • https://togeltop.com/contents/files/gewaxoluperotetodaku.pdfIn PDF document text
    • http://www.siposferenc.hu/html/42002070742.pdfIn PDF document text
    • http://studiospazioambiente.it/userfiles/files/tejewuxut.pdfIn PDF document text
    • http://hasicimosnov.cz/foto/Image/file/80257431790.pdfIn PDF document text
    • https://sbmhavacilik.com/userfiles/file/pinovakinedilavakixiretag.pdfIn PDF document text
    • http://smogy.ru/files/files/65968437769.pdfIn PDF document text
    • http://mlead.net/images/e/file/19715379084.pdfIn PDF document text
    • http://malovanesklomh.cz/images/file/tadaj.pdfIn PDF document text
    • http://songdolandmarkcity.com/userfiles/file/togavigexutitumijeguxe.pdfIn PDF document text
    • https://unovosti.tv/ckfinder/userfiles/files/xixawoxokonurotoleki.pdfIn PDF document text
    • http://rintoyo.com/userfiles/file/surolowaregotamilavi.pdfIn PDF document text
    • https://aynispirit.nl/userfiles/file/95637366421.pdfIn PDF document text
    • https://tahitotfaluovodak.hu/ckfinder/userfiles/files/gotutiwaruxof.pdfIn PDF document text
    • http://abbeytraining.net/userfiles/file/53155049648.pdfIn PDF document text
    • https://doxity.ro/ckfinder/userfiles/files/zezopi.pdfIn PDF document text
    • http://studiolegalebisantis.it/userfiles/files/munofapizemi.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/1613f913cea861---loteginusawonupasetaga.pdfIn PDF document text
    • https://meganimal.pt/site/upload/file/degezibelukopadojijuv.pdfIn PDF document text
    • https://posaonakosovu.com/ckfinder/userfiles/files/85172084653.pdfIn PDF document text
    • http://dallapietamarchisio.it/userfiles/files/laxujelajogavu.pdfIn PDF document text
    • https://makanbanyak.net/contents/files/delemabosu.pdfIn PDF document text
    • http://xn--12cbg9dihj7egda2g6a7dceb1d2cp4nvgf4f.com/datas/files/siminudenemoj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=watch+boruto+episode+162PDF link annotation
    • 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4B5 19036 bytes
SHA-256: 12390de9cc167dece3a01eabf2fbef7092048eda48c95ac28634380bc37cfdd0
font_01_sfnt_off000116d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116D1 11032 bytes
SHA-256: ddf95d55bb6169aa5d1908a794832e091b447dbc590afae112ebd2ec94823468
font_02_sfnt_off0001308a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1308A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1