Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbc6efccfc5469ec…

MALICIOUS

PDF

89.3 KB Created: 2021-07-29 19:51:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 7d7c91b8604172f211ccb8a3d87839a9 SHA-1: b465781c62c6711dcc45e8abd82ddb670951e2ed SHA-256: bbc6efccfc5469ecbe23154904fb927a3c8161f8deca51acffdc73ad8c6f0a4f
156 Risk Score

Malware Insights

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

The PDF file contains numerous links, many pointing to compromised CMS upload directories, indicating a link farm designed to lure users to external sites. Heuristics and ClamAV detection strongly suggest this PDF is a phishing trojan, likely intended to deceive users into visiting malicious or compromised web pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/dacb7118c1e6b3021909b58adfdb1f90/36414905672.pdf In PDF document text
    • https://clinicscrm.com/img/files/monijijijuwipopalor.pdfIn PDF document text
    • http://machinegroup.ru/img/outer/files/jarerirezapufugamavegazi.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bbc93c4a09c---ziwakinabuxipik.pdfIn PDF document text
    • http://csc0351.com/userfiles/file/20210703114625_v8jhct.pdfIn PDF document text
    • http://doggystylzgrooming.com/admin/photos/file/bifigiro.pdfIn PDF document text
    • https://earplighting.com/wp-content/plugins/super-forms/uploads/php/files/704cb6dc5c719c871a7623ac3cb87ed6/xelorujarip.pdfIn PDF document text
    • https://zanhotel.ro/beficientconsultingFiles/file/54250916045.pdfIn PDF document text
    • https://whiteelephant.co.in/wp-content/plugins/super-forms/uploads/php/files/c2654b30dc9b9e9c5758fd6d1124f37f/dakalifogetadamosafonuv.pdfIn PDF document text
    • http://componentcnc.hu/uploads/ckfinder/userfiles/files/mewuduwegedonijebem.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/16076de46d6d98---jefirevizorokumoxikizavam.pdfIn PDF document text
    • http://minhvuongthuphap.com/upload/ck/files/26325134378.pdfIn PDF document text
    • http://kuehllawpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/45671067987.pdfIn PDF document text
    • http://handsonmontessoripk.com/userfiles/files/33735893692.pdfIn PDF document text
    • http://fletcherfamilyreunion.org/clients/52745/File/4630570261.pdfIn PDF document text
    • http://aaaexpressac.com/userfiles/file/xozenaxigedet.pdfIn PDF document text
    • https://meesens.be/KrMee/Tekstverwerker/putagizejufatapom.pdfIn PDF document text
    • https://carparts-fixture.com/file/file/50135072420.pdfIn PDF document text
    • https://www.tunnel.de/files/uploaded/file/fonamafegedumini.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/b1b3f3062f299fdbafe0c0d05e65ed98/69421070331.pdfIn PDF document text
    • http://pwmtqatar.net/userfiles/file/29303184496.pdfIn PDF document text
    • http://abacusnancy.com/userfiles/file/16207989384.pdfIn PDF document text
    • http://okudshava.ru/userfiles/file/1847339414.pdfIn PDF document text
    • http://fine-cottage.ru/userfiles/file/26753592056.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609c894890d64---21941633910.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=nuance+dragon+naturallyspeaking+13+activation+keyPDF 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_off0000f5fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5FC 17536 bytes
SHA-256: c953cbb56b56a5614bef5c41f0a7021782f0439446c613bc8125dee4bf99bbad
font_01_sfnt_off00012430.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12430 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013c47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C47 11264 bytes
SHA-256: 4090edfeff850b692eda0296c9e5c5d65fcbe916530a48e96d175f8daf7a7d85