Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6f227f78539824e…

MALICIOUS

PDF

90.3 KB Created: 2021-07-14 00:01:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 62d5b2309480a086d2e63d9a00cbc3fe SHA-1: 5155d4e84e23cc9628f8948482536b34855846ef SHA-256: c6f227f78539824e570e8a707540c911bd9d0f7f18749aee74a022b9c08b665e
196 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting it functions as a link farm to distribute further malicious content or phishing lures. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests the document may also instruct users to open a password-protected archive, a common tactic to bypass gateway security.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://philabc.ru/uplcv?utm_term=code+bunker+alpha+last+day+on+earth PDF link annotation
    • http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/3b2719d0eb7f36e4d28a1bc89225a609/tojiname.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/16073e036f1b1b---77913676649.pdfIn PDF document text
    • https://fcksa.com/ckfinder/userfiles/files/defanidasakezilomujiwela.pdfIn PDF document text
    • http://hoondb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160842f09edf53---dikepolizedunob.pdfIn PDF document text
    • https://oklogistic.lv/upload/file/96548919758.pdfIn PDF document text
    • http://www.amedna.com/userfiles/files/93816113369.pdfIn PDF document text
    • http://sistersaviopublicschool.com/userfiles/file/renovoxov.pdfIn PDF document text
    • http://businessvaluationapp.com//fck_files/file/44701203645.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca11d9b651---makepore.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160878df12b1a4---jejovunixekejoregewipazo.pdfIn PDF document text
    • http://icltindia.in/userfiles/file/46651046396.pdfIn PDF document text
    • http://selfmadefilms.nl/userfiles/files/94852766104.pdfIn PDF document text
    • http://cuanhomkinhtoanthang.com/media/file/73665864474.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e8bf2a433ab---41908915633.pdfIn PDF document text
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6b8f3ea5db---76539896220.pdfIn PDF document text
    • http://verkaufs-akademie.com/userfiles/file/79967908989.pdfIn PDF document text
    • http://greenlivinggarden.com/htdocs/UserFiles/file/82827743650.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160a8587a587e7---45370559335.pdfIn PDF document text
    • https://kalyna.ua/sites/default/files/userfiles/file/gakip.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb014eee51---tuseradovakodon.pdfIn PDF document text
    • http://autoscuolemontagna.it/userfiles/files/lilosovifetepegase.pdfIn PDF document text
    • https://faresaldabbous.com/uploads/files/zutadutimibiliwixisazale.pdfIn PDF document text
    • http://wsystem.sk/userfiles/files/39232238007.pdfIn PDF document text
    • https://giverny-bkk.com/upload/files/xepasesutuzu.pdfIn PDF document text
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160763e0d672aa---76927730654.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/72d5d8913a6e64efa18a14507c2bd404/59400986440.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_off0000fbbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBBF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000113d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113D6 10876 bytes
SHA-256: 082a652b710497669d47ec41a626ea4c53981c18c8a2c6dc00dc44b29b15c920
font_02_sfnt_off00012cbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CBD 17384 bytes
SHA-256: a1cd55d71df05750bd9f002fb551d7cb3307ea6414888c6eb068d05188ae5c30

Open this report in the interactive analyzer, or submit your own file for analysis.