Malicious PDF — malware analysis report

Static analysis result for SHA-256 08ab0a0c58debd98…

MALICIOUS

PDF

83.5 KB Created: 2021-08-11 10:52:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: e666bbfd85c924442f5e2724232cacbf SHA-1: 8629621a83af4fb2439bcc629bebf7624c14c685 SHA-256: 08ab0a0c58debd989cb09be1fdda5b9cd68d6231982412783b1b045640763fd5
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://togetherwewalkny.org/clients/2/24/2411cc079aa0f0d7fd57f81c6163ecfd/File/netevabesekobonu.pdf In PDF document text
    • https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/8f87298dd9830ad7f9dd2295ef35908a/jezalakozedid.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8590ce700e---lotabadore.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/c4hvfnjmkp904egf8gqh7928n1/zodakuditasidulosutejofu.pdfIn PDF document text
    • http://nfraccon.org/userfiles/file/puvujulasu.pdfIn PDF document text
    • https://megashina24.ru/files/files/gugilalugodudude.pdfIn PDF document text
    • http://viprealestatebrokers.com/userfiles/files/toralazejugobavi.pdfIn PDF document text
    • http://uro-medical.pl/zdjecia/fotki/file/90667770029.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/08ec284679d3cc29d209089f2fcbb75f/zumufulosikukudezotuda.pdfIn PDF document text
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/ekjvo2md4d1p2il1s6p9juehag/1066367004.pdfIn PDF document text
    • http://ktcz.eu/files/files/83518640955.pdfIn PDF document text
    • http://rideco.hu/upload/file/jexatepux.pdfIn PDF document text
    • http://sgpeo.pl/users//file/litazovojilewilixipuruka.pdfIn PDF document text
    • https://mygenius.ru/admin/ckfinder/userfiles/files/88491835965.pdfIn PDF document text
    • https://belitour.ir/basefile/belitourir/files/59450927806.pdfIn PDF document text
    • https://ienter.bg/files/zefugujofapujapagowumo.pdfIn PDF document text
    • http://memphiscentral1969.com/clients/865565/File/60851280651.pdfIn PDF document text
    • https://adlinefor.com/home/webagen/public_html/korn/data/file/gapipurenofogedivi.pdfIn PDF document text
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/c784e6175b2e23f46afa0bb45880f947/99614203177.pdfIn PDF document text
    • http://ttmm.co.jp/ckfinder/userfiles/files/komuwoninabevodamajavito.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/0b526135424939aea456fc8f2b70e0d0/69148061250.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607e87ab53429---42932733786.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=drill+master+90374+replacement+batteryPDF 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_off0000e24f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE24F 16588 bytes
SHA-256: 1ce7f97b7c533edc0f6a208d7c62a14c067c0a9a1e7b23919d3b2701a8ebeff7
font_01_sfnt_off00010d9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D9D 11260 bytes
SHA-256: 186b1417168b561e6d29411147c5e71c1b0dbba8a82908e4d681fe32ff8aef26
font_02_sfnt_off000127f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127F3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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