Malicious PDF — malware analysis report

Static analysis result for SHA-256 4689eed63319eeb8…

MALICIOUS

PDF

92.0 KB Created: 2021-07-08 02:07:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 7e10c9185033cdafa886d21ac08c53ce SHA-1: a991f632d496079724ab6321073addf486bee2ce SHA-256: 4689eed63319eeb81ddf0ac7058f1d1f81e09b4aad946d730bb2c0400e658480
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to potentially compromised CMS upload directories, suggesting a link farm designed to distribute or host malicious content. The presence of embedded URLs and the PDF structure itself are indicative of a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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 http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/slalktkqfoccphuh8gcsfnmgh4/gugen.pdf In PDF document text
    • http://payassistinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609938b3d3e4d---75808830610.pdfIn PDF document text
    • http://thaide.org/userfiles/file/ralabotiravawugavolinoguk.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/16070f625ce0c8---34519287725.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/1606cab9809d6f---99481442176.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607d61113955f---posaveniriponufodu.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/jr3bl35a3h2hudam8v0buqdd51/28231972031.pdfIn PDF document text
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1607da53448efb---vibupebololu.pdfIn PDF document text
    • https://kontiko.com/ktkweb3/images/upload/files/73415094600.pdfIn PDF document text
    • https://on-call-anatomist.org/ckfinder/userfiles/files/87769797633.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/60ec8b130aa1357a984cb48e6349e7aa/71857876143.pdfIn PDF document text
    • http://eska-lift.ru/userfiles/file/19266866787.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/e77a315830e9d28952c27a5a36d843a1/jipatixuxupuwa.pdfIn PDF document text
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/c033939f0e119054d5be15072a0f5c77/nolukudixuv.pdfIn PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/f0aa753e999b1fc33a038537e698d076/47684140456.pdfIn PDF document text
    • http://aggengr.com/uploads/CMS/file/58677663771.pdfIn PDF document text
    • http://allycatering.com/userfiles/65993784697.pdfIn PDF document text
    • https://law.com.sg/wp-content/plugins/super-forms/uploads/php/files/a672aeab02bf67846cd4c7b8bbb220e2/kawiwiletefo.pdfIn PDF document text
    • http://payassistinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608485c12556f---ramotorowiwo.pdfIn PDF document text
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/db813be185406c90979b063b8983f4f3/fovizaz.pdfIn PDF document text
    • https://alatheir.com/atheirwsfiles/file/fabane.pdfIn PDF document text
    • http://roland-toys.eu/userfiles/file/powuxisirovug.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=can+i+drive+in+another+state+with+a+permitPDF 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_off000102fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102FE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011b15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B15 10792 bytes
SHA-256: 68631707ff9f623084ea77ae36b82f6081cb0bee7b3732e6ebf5aed4cf9afcaf
font_02_sfnt_off000133d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133D6 17380 bytes
SHA-256: 76330484da1d4620940bca961c08d52c6e71639046223e5f1dacac2b990a5e49

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