Malicious PDF — malware analysis report

Static analysis result for SHA-256 377b40e903690a2e…

MALICIOUS

PDF

89.7 KB Created: 2021-08-13 11:07:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 320c956ef66a40d73a0c47cf862a7c03 SHA-1: 378d20445c752046e9467e6b5ee7a1437b9f1242 SHA-256: 377b40e903690a2edd7c1d5795ee4621ea7cdce554b372a98e0dfaff2c8d3fdc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised CMS uploads or disposable hosting, suggesting it functions as a link farm. The presence of URLs with terms like 'cash app money generator no human verification' strongly implies a phishing or scamming operation designed to trick users into visiting potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2f0d22119f---38700179289.pdf In PDF document text
    • http://dwhs79.com/clients/15834/File/mijinomebolasofalobomo.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608dc4a77d3d6---63410878100.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/fea6rih6pvs420j3moao0c63s7/ravupateg.pdfIn PDF document text
    • http://vicorsupply.com/uploads/images//files/wipijawojojutak.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/7d9hvtomksi7lo85rf69cirtae/wufujufomi.pdfIn PDF document text
    • https://semagro-msw.ru/pics/images/file/nefupo.pdfIn PDF document text
    • https://sharadsangam.org/UserFilesTwo/file/51520277276.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/6f2a23ba617166c24316c727bcd0ccdb/bovobilikilaxetedebowiku.pdfIn PDF document text
    • https://aadhaarretail.com/administrator/imagetemp/file/98136080614.pdfIn PDF document text
    • https://sensiblemachines.com/ckfinder/core/connector/php/files/7986220553.pdfIn PDF document text
    • http://baohanhranghm.com/upload/img/files/guvukuzinozologuw.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/7ba5bb1f61dede71be12df87e953e4f2/44533378067.pdfIn PDF document text
    • http://lagostena.it/userfiles/files/gigixilogapojofulif.pdfIn PDF document text
    • http://szolnokepul.hu/userfiles/file/47268351572.pdfIn PDF document text
    • http://biaikatolikus.hu/files/file/89317169240.pdfIn PDF document text
    • http://archi1919.com/smlclub-files/file/32469860797.pdfIn PDF document text
    • http://maciejabramowicz.pl/upload/files/file/34413385256.pdfIn PDF document text
    • http://cheapneasytrafficschool.com/CheapNEasyTrafficSchool/pa/trainstation/uploads/image/file/97925962460.pdfIn PDF document text
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1608771294dfc5---xovejila.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/3c03cd377ee996cca1a646babb67ae01/41783345842.pdfIn PDF document text
    • http://richiefamilyreunion.com/clients/7/7d/7d03816b951c94fc7c065ced7c7ccdcd/File/mipegifinonu.pdfIn PDF document text
    • http://romengo.com/ckfinder/userfiles/files/40144047799.pdfIn PDF document text
    • https://andrejc.si/files/file/14192308526.pdfIn PDF document text
    • http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607c79d3bf7bd---gaxifomidom.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=cash+app+money+generator+no+human+verification+2020PDF 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_off0000f852.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF852 17112 bytes
SHA-256: f6d129ec98314d3391508c0fd43970593ac1ac23ade352f4fb38b13fed5d22cd
font_01_sfnt_off00012509.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12509 11436 bytes
SHA-256: bbabd4d30d8837a6c6408b2f622ce08c4a016dd2c1b6fe80842fb8a62ab8f1fd
font_02_sfnt_off00014001.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14001 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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