Malicious PDF — malware analysis report

Static analysis result for SHA-256 d03a7b7f4e0b5af6…

MALICIOUS

PDF

116.5 KB Created: 2021-07-02 08:06:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: f1e3cbce5f83c241eeb7cc974712d9fb SHA-1: 0e93609d2db154d310f8451e9d68efde622cb68b SHA-256: d03a7b7f4e0b5af670679d649555e2310f8ac7792a02498061aaea1e07a9b051
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to compromised CMS upload storage, suggesting an attempt to distribute further malware. The presence of a 'Password-protected archive handoff' heuristic indicates the document likely instructs the user to open a password-protected archive, a common tactic to bypass gateway scanning. No scripts were extracted, but the overall structure and heuristics point to a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8164af3e04---77569436373.pdf In PDF document text
    • http://tubietelbar.hu/uploadfile/simefitobeguvel.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/da9e24462136398fb91d51042a42774d/75419050518.pdfIn PDF document text
    • https://gionggiacam.com/ckfinder/userfiles/files/92423397157.pdfIn PDF document text
    • https://nattasampun.com/upload/files/juroderafadepavaj.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cfd2e406692---fiselunoruketuvum.pdfIn PDF document text
    • https://zold-kommando.hu/files/77026189125.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adfed0a8111---85385926069.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/u8u0kuk3u2qlh9nbqhsb7r1ur5/baxaminoketaminaxol.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606c913fa54ca---24711376098.pdfIn PDF document text
    • http://bright-mineral.com/uploadfile/file/2021061906352688.pdfIn PDF document text
    • https://dcimx.com/files/pezimosanagexabut.pdfIn PDF document text
    • http://moto-bike.pl/userfiles/file/26176844791.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac22f8a8c7d---15622645538.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b43e53e8348---kimagidufivasurup.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/b870d4abe233fbdc2cd90e1e600fc7fd/9859085985.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/0327635b61a98c8f5cc2a0d98729e025/namogigudafixan.pdfIn PDF document text
    • https://alshaabcoop.com/userfiles/file/60925927927.pdfIn PDF document text
    • https://drivetripper.com/userfiles2020/files/24721021219.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/p3o4phr4onhebii1014b9s3450/jugubififujazasawuvawora.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/16070a45a947a1---remipomexapabixezus.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160baa4f11a97f---wufuzufiluxemasalozoxoji.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075861ac4417---61279991284.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=portal+knights+mobile+apkPDF 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_off0001651f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1651F 17628 bytes
SHA-256: 5fb3ee8e3cb5a0e8a0798dcf6a66abce9f8a00ca1bbe4773cd1e7c75ad0cc008
font_01_sfnt_off00019366.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19366 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001ab7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AB7D 10932 bytes
SHA-256: 9a777ddcca5ffaaff38df685cf0c1cbc3375537adcb52d89268b2931bf7df5da

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