Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9a1bc3f45330fd2…

MALICIOUS

PDF

86.9 KB Created: 2021-07-16 11:46:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f282593dfce2a197772c526f6b6f511a SHA-1: 8f8c8f3093c0cebe82656fcf77d3a524e57f1284 SHA-256: f9a1bc3f45330fd26466615c0faaa762ffa1bddae1afc16a031e4ea49f92e30a
196 Risk Score

Malware Insights

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

The PDF document was flagged by multiple heuristics, including ML classifiers and ClamAV, for malicious content. Specifically, the 'SE_ADVANCE_FEE_SCAM_LURE' heuristic indicates the document's content is designed to trick users into paying fees for a non-existent prize or parcel. The numerous extracted URLs, many pointing to compromised CMS uploads or disposable hosting, further support the malicious intent by acting as a link farm to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://hysansam.com/fckeditor/userfiles/image/xodipojitu.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d63b08a741---vekixibuzefamu.pdf
    • https://leganordavigliana.it/uploads/file/lutodulobugemuri.pdf
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a06b32bce37---87911141563.pdf
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c1251640bca---jatisevasimunedob.pdf
    • http://secohthailand.com/file_media/file_image/file/86051460021.pdf
    • http://www.urbanwaterways.info/files/69910721504.pdf
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094b7e3de0fc---sulojogekun.pdf
    • http://adabaskimerkezi.com/upload/file/51627099696.pdf
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/5ab1ab88ee9964bfa53af4dad7613560/worabalevoravakara.pdf
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609312d3dc5f9---53700299548.pdf
    • http://planetamama.ru/files/file/49334697619.pdf
    • http://anandtouristcorporation.com/uploads/13048281181.pdf
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078a69222cc0---32047101588.pdf
    • https://cochleartudaskozpont.hu/files/63484679410.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9397d6ab04---ruxijob.pdf
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160c8566801b39---figupowubifuziwadasudivem.pdf
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/2088ef185bee9590f5cf462e26989b94/lemavalekixazo.pdf
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c7057c8b6d---60088820752.pdf
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/ga1kbs3hjulo17rse6l7eok6id/guwupuniz.pdf
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/ac11f3e4dc5b16ce325ed302de5c665d/kijejanutazuxamumapiji.pdf
    • https://plasy.com/uploads/file/74102243675.pdf
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3010d7ce80---56899257499.pdf
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/daf16c1decdd48e8769129f609781c8f/29213914023.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=ipo+stocks+this+week
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f285.bin
32b2cec820bf5e6ae1b4a325b16a6c4a80e1d062d91b34480111fec94095811d
pdf-font-stream PDF embedded font (sfnt) at offset 0xF285 17068 bytes
font_01_sfnt_off00011f03.bin
0b537c8da7d4b1afa5e5348cebe4399115df68ea051cd305f2e81f23c93813e2
pdf-font-stream PDF embedded font (sfnt) at offset 0x11F03 10188 bytes
font_02_sfnt_off0001361f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1361F 16792 bytes