Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e950ef36cd2cb49…

MALICIOUS

PDF

88.9 KB Created: 2021-07-14 07:42:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 6fd4c2c7823e9e96f500e88fb06ae84b SHA-1: d2fafcce4c6b5f85a25775420d5231b4aab9b534 SHA-256: 1e950ef36cd2cb49bff1f04ffd1d718ce162d50183dff538ad4256ea1b5b3ac4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external URIs and is structured as a link farm, with many links pointing to compromised CMS upload storage and disposable hosting. The primary goal appears to be directing users to malicious websites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://philabc.ru/uplcv?utm_term=dom+and+sub+mean PDF link annotation
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/15f4eaa6293a09af0d145c1bc8082333/23784050069.pdfIn PDF document text
    • http://haiqi-machine.com/d/files/tutegapuko.pdfIn PDF document text
    • https://tckontrola.hr/files/36266824025.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/44346536787.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080edb8d7cf0---40878813361.pdfIn PDF document text
    • https://tractorpulling-emmeloord.nl/upload/file/99140853786.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c5fbce36fc5---sidalobija.pdfIn PDF document text
    • http://goref.ru/files/file/99277932380.pdfIn PDF document text
    • http://www.monts.sk/upload_images/file/7722192678.pdfIn PDF document text
    • https://autoandtruckrepair.net/nbloom/fckuploads/file/30504076945.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/ml7o1gm0a21tu9khe2ibclit52/55079166079.pdfIn PDF document text
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a3f259b1d4---wenazegita.pdfIn PDF document text
    • http://cn-noah.com/uploadfile/file/95908069638.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608037065059f---lelase.pdfIn PDF document text
    • http://fouladsazanco.com/Upload/file/wegibajiz.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075afd986f52---362125339.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/b8m9ueqfntjv0r00b0umktevl2/92285760274.pdfIn PDF document text
    • https://eternalbliss.net/file/kebotipifegatimedet.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/2c93e53063b14a0599193d8aa4aefa83/98837233110.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160afc4293b6b3---zefidajarezududujolow.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/11d7d441be39e51008edcb958f2bfbe0/zizemifukogolenaxa.pdfIn PDF document text
    • http://modnyi-buket.ru/uploads/files/47295469267.pdfIn PDF document text
    • https://www.jscorporation.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1608cd0bbe83ca---93852855767.pdfIn PDF document text
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bab87891d53---82863649748.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_off0000f95d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF95D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001116f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1116F 17168 bytes
SHA-256: a79b55c74e5f4657c1e4608666ba5e5f6d3326ff981360b6ec8538cace16d1e1
font_02_sfnt_off00013e34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E34 10316 bytes
SHA-256: d43580176db0e78520b23fbd12eace540a81aafdc17ad732096592a7d65018a1

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