Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0c629183336061b…

MALICIOUS

PDF

87.5 KB Created: 2021-07-09 08:07:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 89458645150eb1f61fbb2925fd75a2db SHA-1: 18ea86f7dc2d31e26bffcb95a2420d51ce4c8327 SHA-256: d0c629183336061b08b837d3de4aecc6aa75e09104c73584823adb33573b48d9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of links, many of which point to compromised CMS upload directories, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, and the document body was unreadable, so the attack pattern is inferred from the URL structure and heuristic firings.

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 http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160838d57ce43a---56385037345.pdf In PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/aujb6lno6dd4ppm7invtulo622/57088490542.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080a7a7bdc23---lesitikabigibimu.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/uhr7jrn42pn29fvoio9g087non/gumonogovep.pdfIn PDF document text
    • https://aspirans.com/files/file/gixapikugomobafafipagomo.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16071e9ccd4da6---lugijuronokuvegugugeg.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16096e7fb79dfc---kexuvipidi.pdfIn PDF document text
    • http://dentherapia.hu/files/file/zogewabo.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c549a8c34c0---nidipibowepujo.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/d8af4880749c1c9089bed4e067e2a3f6/rimajode.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8769df0c5c---godijer.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da7fa72ac33---wamuzejox.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/f316cf7ee18aded46597a7d437d92eb4/fiwemebu.pdfIn PDF document text
    • https://centrosteadycam.it/wp-content/plugins/super-forms/uploads/php/files/751c0509e3467710674f9c89429e9793/doninuditurozinukosejokup.pdfIn PDF document text
    • http://bona-agra.pl/Upload/file/zarikonevivixizemoketisu.pdfIn PDF document text
    • http://hockeydh.com/files/ups/files/35148296799.pdfIn PDF document text
    • https://soalmatematik.com/userfiles/file/sexaxusus.pdfIn PDF document text
    • https://harrisitalia.it/uploads/file/81919747599.pdfIn PDF document text
    • https://waelfawzy.com/userfiles/file/In PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/15te9e5vfu1uc3rhmjsmouq1ad/85870206160.pdfIn PDF document text
    • https://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/45cd050ac6da65ffcb733ad5da1d36da/64078009394.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/160947d05313bc---8049743216.pdfIn PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c6a22e1c98f---texavo.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608a4372225b4---30205798735.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=mark+curry+hangin+with+mr+cooperPDF 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_off0000ef39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF39 18292 bytes
SHA-256: be2ecc2caf74779a2d0234fc9fd8ea0065f11626da4d1afc301c37c45e41e9ac
font_01_sfnt_off00011f5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F5B 10992 bytes
SHA-256: b87793f1cb2f311573f2fd0b124fe2d0d13593ef64f51ba0c98c579fcae515eb
font_02_sfnt_off000138dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138DC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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