Malicious PDF — malware analysis report

Static analysis result for SHA-256 934bbaba921f07b4…

MALICIOUS

PDF

108.1 KB Created: 2021-09-07 10:14:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 6524bd4fa5750f54a28e60045d308a4c SHA-1: fefda091b51a4c4ac835d7c53351b20c71079e10 SHA-256: 934bbaba921f07b436ee1512d29e513f4bb78eb89ad227a51c273ad446d739c2
156 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 https://raiporjai.com/piceditor/file/zusojeradefitomivedusi.pdf In PDF document text
    • https://amerismithenterprises.com/wp-content/plugins/super-forms/uploads/php/files/c917663fc399b1f63faf4dde4dc0f224/93757940730.pdfIn PDF document text
    • http://villapellegrino.it/userfiles/files/pazoxebeni.pdfIn PDF document text
    • https://rivieresoceanie.com/ckfinder/userfiles/files/sagamiribipe.pdfIn PDF document text
    • https://almuhja.net/ckfinder/userfiles/files/29994306666.pdfIn PDF document text
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/ebi2fe633ejud06b8d8016hne6/sovujalibofa.pdfIn PDF document text
    • http://nowyhotelik.pl/userfiles/file/79298692939.pdfIn PDF document text
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/0gqqakqea2cfo98nie14l5p9eb/13378835289.pdfIn PDF document text
    • http://adria-ex.com/images/blog//file/61852272242.pdfIn PDF document text
    • http://ux-school.ru/files/files/mafevetiw.pdfIn PDF document text
    • http://chiaranannini.com/userfiles/files/sumusofurusibagutagojak.pdfIn PDF document text
    • http://tele-video.ru/upload/files/2463777958.pdfIn PDF document text
    • http://tortsurprise.ru/upload/redactor/files/54047540306.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/47415fad0e516168f8a8eb33b83fab72/xemadixero.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/30f7e0ce80bf190b1be4e736832fcdc1/24196668292.pdfIn PDF document text
    • http://valdhans.cz/userfiles/file/50300167336.pdfIn PDF document text
    • http://balassalaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/nuropo.pdfIn PDF document text
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/d89s1494rm7lkqak1i5oso8bo9/nuwiwabuj.pdfIn PDF document text
    • http://sns-russia.ru/userfiles/file/zopejowi.pdfIn PDF document text
    • https://pt2-turbo-j3t.com/contents//files/97608165233.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160754e08853ce---jeguvapul.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e58b8e1b474---45466646848.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=pdf+enamoramiento+y+amorPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014207.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14207 10416 bytes
SHA-256: 25e77b2c1564d385e9ce312bc898c811e578f700630c035d553e0e714a31202b
font_01_sfnt_off0001599d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1599D 19228 bytes
SHA-256: 77135455e9c2b0518e4788099d8a8f14e6ff730b360a751c5edf5e4f82824477
font_02_sfnt_off00018a34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18A34 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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