Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5ec0f579d32ea4b…

MALICIOUS

PDF

83.0 KB Created: 2021-09-04 00:50:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 452d1d6dc823123321cf0aa706e0e3a7 SHA-1: 9c6f492b1d32096c387dbcb0f4c98be5d41b491c SHA-256: c5ec0f579d32ea4b8db87776652c23b97ead41b54f50d0687ec2273d93808454
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery. No scripts were extracted, but the embedded URLs and heuristic firings point to a common tactic of using documents to host malicious redirects.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://414movement.com/wp-content/plugins/super-forms/uploads/php/files/0f153e2901af26a61b000ad4f02c2099/86022201912.pdf In PDF document text
    • https://manuscripthandler.com/userfiles/file/xosofidipigov.pdfIn PDF document text
    • http://dekoblickfang.de/userfiles/file/bititobovinexuledanije.pdfIn PDF document text
    • https://chp-travel.ir/data/file/13577224245.pdfIn PDF document text
    • https://airflow-skateboards.com/upload/file/zivonis.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160810227ad615---pusujitezoburaretelatisoz.pdfIn PDF document text
    • http://hydrogears.com/survey/userfiles/files/55886849468.pdfIn PDF document text
    • http://floramarble.com/uploads/25808630919.pdfIn PDF document text
    • https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/840fe96704d6a8453ab7db821af07567/94030067489.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/3c40f3185e3e586a38a2675570c51d55/mifor.pdfIn PDF document text
    • https://euinsuti.ro/app/webroot/files/userfiles/files/7924864296.pdfIn PDF document text
    • https://xo-sound.ru/userfiles/file/budinedetojebo.pdfIn PDF document text
    • http://mosvag.ru/img/lib/file/43524702474.pdfIn PDF document text
    • http://logiccpacma.com/ckfinder/userfiles/files/75612761395.pdfIn PDF document text
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/5590fe6d55e3eb387ee6187eb1a4fe2a/37276449734.pdfIn PDF document text
    • https://almoheetmanpower.com/public_html/userfiles/file/kotisu.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/pepup.pdfIn PDF document text
    • http://biomehl.com/images/content/files/91188443444.pdfIn PDF document text
    • http://3qlohas.com/CKEdit/upload/files/savozo.pdfIn PDF document text
    • https://marjoyunlar.com/calisma2/files/uploads/86759731798.pdfIn PDF document text
    • http://slp72.com/clients/7/7b/7b902bee17765b19ebdde6030f24742d/File/xapuretugitubapelera.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160711f1059ccc---sidogixeni.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160ba847c25d4b---pogexuvatijumoribet.pdfIn PDF document text
    • https://somogyplusz.hu/files/pufupafonijafiti.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6c77f56f53---boterosilutefesiw.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bea671f0b8---16426713546.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=giesecke+%26+devrient+bps+c1+manualPDF 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_off0000e147.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE147 18216 bytes
SHA-256: 96ac8ad9810523a9b6d347aa2d637723dc97d95aff62ae3fea620cfe5126c5f9
font_01_sfnt_off00011113.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11113 9716 bytes
SHA-256: cef2a1a0f6cffa8bf06050bd908ab705021d9b01de6e417cb25dac6f55077a8e
font_02_sfnt_off0001265b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1265B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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