Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3a3c20e72ce1793…

MALICIOUS

PDF

85.4 KB Created: 2021-07-14 00:09:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4599d1f66029e7a5ff42a4675a51c625 SHA-1: 9e8ea2e672dfa86c0804c4338c9c170f16da088e SHA-256: e3a3c20e72ce17935e019463b5153a42511d5ff5efd21f589e936ee863a2f8c5
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites. These URLs are structured as a link farm, likely intended to lure users into clicking them for malicious purposes. The ML classifier and ClamAV detection strongly indicate malicious intent, consistent with a phishing or redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9762

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://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/e6f3650f02b9fd824cf436cf0f511c1f/34188614455.pdf
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b87d8ba1028---kajovigiw.pdf
    • http://reikihaus.com/clients/75291/File/56618626962.pdf
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071143297ecb---44641662256.pdf
    • http://sevimticaret.net/userfiles/file/rewosig.pdf
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/fasg4avd2p884gsc7ebco27iff/doresu.pdf
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c36cb54ff53---wumuzuxalapadanek.pdf
    • https://cnc-ar.ro/files/file/41298191006.pdf
    • http://radissonhoteltraining.com/userfiles/file/63635885276.pdf
    • https://airshow-bg.com/file/90354634087.pdf
    • http://tysons-cafe.com/uploads/files/diregemub.pdf
    • http://prof-cosmetics.com/upload/files/vozezuserisobefavi.pdf
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160883684dd786---sifarowarafebasurakej.pdf
    • http://tvtamminhphat.com/uploads/userfiles/file/8321330836.pdf
    • https://llsindia.in/FCKeditor/file/levolif.pdf
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d636484011ffaa9f3bec5a5a1f22ac09/34743291083.pdf
    • http://baaningdoi.com/file_media/file_image/file/wipozuvisagirosomo.pdf
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160abb0ddbcafc---rosefudepewimajoruf.pdf
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080d9b325acd---4437982615.pdf
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac4637c28a3---43120195003.pdf
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbbec6b3871---50117913282.pdf
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/7eae83da997e3d30878ee5015f28f4b1/89763591963.pdf
    • http://apsara.ru/userfiles/file/37994179266.pdf
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16071edcde5187---gazuju.pdf
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a0b9e0663c4---pesenogeterivugigumone.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6830b84b70---66803035675.pdf
    • https://alakharia.com/public_html/userfiles/file/69872581999.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=houston+to+port+of+spain
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d576.bin
0768ee83ebb65f3f424633c3ca2a62b70f71464e4eba31835adfd04aa4385c2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD576 16136 bytes
font_01_sfnt_off0000eaf7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEAF7 16792 bytes
font_02_sfnt_off00010309.bin
7df052b8fd7966c402b181b545b55aa93e1bebeac8268b0e5828065bbc8bab18		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10309 17356 bytes
font_03_sfnt_off00013066.bin
b53dc9b1125de0521888789b5387d63f2413c98fefd3120659bd8e750e73999e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13066 10264 bytes

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