Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3d8ddfbe01ba09e…

MALICIOUS

PDF

83.0 KB Created: 2021-06-27 20:52:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 5e73134eb159aba48ff08770a69196a3 SHA-1: 041de88b345b0cf414ba259e56d0d4763af84c95 SHA-256: e3d8ddfbe01ba09e617f2296fdea5b3a38f8789dd442bb2421af0819d6575475
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, indicating it likely serves as a phishing or trojan delivery mechanism. It contains a large number of embedded URIs pointing to compromised WordPress sites, suggesting a link farm designed to host or redirect to malicious content. The presence of these links and the overall structure strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/6fb9a429b504d690669650aa806e685e/84459997418.pdf In PDF document text
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/ba488dcefd28303ba900674d3a5cf1c3/93441990763.pdfIn PDF document text
    • https://cometsecurity.in/admin/userfiles/file/73923821143.pdfIn PDF document text
    • http://srihemkuntsahibfgp.org/hemkunt/userfiles/file/dixuduwos.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160802c675fd40---bukuvotav.pdfIn PDF document text
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/3d6e1bd91c603f9288d7b5c9300c1052/wulisurofovovawekegefo.pdfIn PDF document text
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/3qatgn0fckrm7gnu4m597dhu7c/20410391998.pdfIn PDF document text
    • https://dbmotorbrokers.com/userfiles/file/xaloxelesuzoronitob.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/95c2ff6dc8652722a9082e6a6e6ad2eb/garoxetupa.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160abe20f1c7c9---nagoposagebirowodunaxex.pdfIn PDF document text
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160aa5655dcb3e---vokuzadolujunu.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/ea0bcb6219aa9fc92e94fb360d1dd24c/marabuba.pdfIn PDF document text
    • https://abugfreemind.com/userfiles/file/jodedesegib.pdfIn PDF document text
    • https://kuepancong.com/contents//files/38431568883.pdfIn PDF document text
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/d30c25865bce1cb7c7fe579d9bc228c1/pamemupowafarase.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/e78b384b09815bbbfed37f6d3a1286ef/vumofezuvaju.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/93sea9use8gbsvoe3lct6inlk0/fitikebubidularezumuvesav.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4ceed672b7---pogonuniniwimedijapilenak.pdfIn PDF document text
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/f275b85e8c0207488b1d026624a82d78/41759198445.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160993581156d1---vuwimewopimuwos.pdfPDF link annotation
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/35ds94kn2v7bb5vjum0o46npod/25188725579.pdfIn PDF document text
    • http://bhavalaya.org/ckfinder/userfiles/files/70423588047.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16098e1dac5e93---rofugovabisalokile.pdfIn PDF document text
    • http://nedirajtebosnu.net/userfiles/file/1734983893.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=global+air+currents+mapPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e205.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE205 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fa1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA1C 10812 bytes
SHA-256: 298f2473ddd335950bf695e52efa1897943d8b90449707dc5a6569f616b1283d
font_02_sfnt_off000112cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112CC 17012 bytes
SHA-256: 6a0678812841bd1ae19048a3dcd2a8f459da51d0a122eacf40452b2c75e2fd19

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