Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0189db2125e622e…

MALICIOUS

PDF

86.3 KB Created: 2021-08-13 22:23:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4f4a1a3ebec05cd86f747e4013745022 SHA-1: 64e76b31fbdf7b02d58e83f5f37cf21ed17c503e SHA-256: c0189db2125e622e6c6d96666a5ced90045f7e06c0d8a780df59dfc2e7e52ba4
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious and likely part of an advance-fee scam, using lures related to lotteries, prizes, or parcel deliveries. It contains embedded JavaScript, which is often used to download and execute further malicious content or redirect users to phishing sites. The numerous external links to compromised WordPress sites and disposable hosting further support the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 https://laborke.ru/uplcv?utm_term=what+are+the+responsibilities+of+employers+and+employees
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16089d45a37450---wekiz.pdf
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fa720d24d30---kawedavazokanojojomu.pdf
    • http://highendschmiede.de/highendfiles/file/56481511161.pdf
    • https://ijmscr.com/ckfinder/userfiles/files/luneponofevekazidanoxop.pdf
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5a4eb1f4a1---73876865615.pdf
    • https://akproauto.net/nbloom/fckuploads/file/84190994902.pdf
    • http://adabaskimerkezi.com/upload/file/dekoju.pdf
    • https://doublehaircenter.com/upload/ckfinder/files/xukob.pdf
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/ibp8v9nte8q0hbifm5rk4pqk44/94167513055.pdf
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160dbfcbc9cba9---58109534632.pdf
    • http://robbinsfamilyhealthcare.com/clients/2/2c/2c787fa606fc56c3a3a24dfc5409695f/File/tamoteduwureginimozojus.pdf
    • https://learningsolution.ca/userfiles/files/gifokusesirumifuzokajep.pdf
    • http://zabradli-znerezu.cz/userfiles/file/48930592178.pdf
    • http://bluecars.pl/userfiles/file/xubawurubupixexusitido.pdf
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/16075441ee3cdd---69640390125.pdf
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/160abe77ad1392---23531930771.pdf
    • http://mediedil.eu/userfiles/files/2743364221.pdf
    • http://sincaremedicaltour.com/js/upload/19943251670.pdf
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/268htt3vj69blpvsll025a0mi3/vimebef.pdf
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4133fc054c---50787586561.pdf
    • http://74ahs.com/clients/2/2a/2a132ee8da0778863662fd4b1fa251ed/File/xidakemexuzadigerusazoje.pdf
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/4a84941d6ead2e2eb649df3862f9afcf/jesanijur.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/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ede7.bin
5ee044a2d35abc72d9a2a02d3647defe8309cd49e7b9d27fd06f37148d5aeece
pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE7 16788 bytes
font_01_sfnt_off0001197d.bin
4d382d8bec10e0eaecbee96fb0e41ccf9f63ab5e1a72009ab61174839d8f5260
pdf-font-stream PDF embedded font (sfnt) at offset 0x1197D 11008 bytes
font_02_sfnt_off000132ab.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x132AB 16792 bytes