Malicious PDF — malware analysis report

Static analysis result for SHA-256 30b55932c1163aab…

MALICIOUS

PDF

97.1 KB Created: 2021-07-01 21:15:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 0f533975997fba07d4c459e1145e5924 SHA-1: dd519eb10c4a2e92b0368058900bd7268d97a183 SHA-256: 30b55932c1163aab38b4a4af40efcb3bbb79b9b0412a4fe1bba5d0ef3744359e
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the structure and embedded URLs are indicative of a phishing or downloader lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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=3+gifts+to+jesus PDF link annotation
    • https://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/3142b0e5dc433580ad4655ec6fd12229/fomusejuribemowis.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/725d7rn718837gjtobset4afl4/71259878727.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d3662171fe---20204396922.pdfIn PDF document text
    • https://turkihale.com/userfiles/file/lifilumula.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c05567c4334---68867201450.pdfIn PDF document text
    • https://yingzhaoliuart.com/upload/file/38415391247.pdfIn PDF document text
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1606ffb17e9400---47393244330.pdfIn PDF document text
    • http://aclamerica.com/customers/CMS-IMAGES/file/gefip.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/jb726pte3fdo9fa6p7lkba7nq4/73591896037.pdfIn PDF document text
    • http://sashtraayurveda.com/ckfinder/userfiles/files/28281437221.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a91c07d8452---nafereduzo.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c343b47710e---40121526255.pdfIn PDF document text
    • http://emrc.ie/upload/imagecontent/file/wamopobizopazizifibis.pdfIn PDF document text
    • http://klefmarken.se/upload/file/43537914864.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/aac1058f018ab7989b8ff940bfca692f/wokokewilosowodoruna.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/2a561af4b7ea3eea32ec76cff07735b0/58504632272.pdfIn PDF document text
    • http://nickels.design/ckfinder/userfiles/files/sutizajuturukuduf.pdfIn PDF document text
    • https://hoalavender.net/upload/files/37952280188.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b841eded446---87413108900.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c68f439af42---luluwezugijekoxuruze.pdfIn PDF document text
    • http://lungshingcentre.com/userfiles/12139905306.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/a58dnvdb4qildgg3tlh6290ra0/pufuporeravuluweliw.pdfIn 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
    • 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_off000119f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119F4 10284 bytes
SHA-256: beb4383de833c1d65e470669487995dd04375efac27fba261a7c0b028994bcd9
font_01_sfnt_off00013137.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13137 17676 bytes
SHA-256: f81af8786e99057172ad3b5b4c905fdfd24e503efd4b6298c14065ca09af972f
font_02_sfnt_off00015f51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F51 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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