Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6a0d7e526ddd3f8…

MALICIOUS

PDF

87.1 KB Created: 2021-08-09 19:37:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 40c5ee20c8958b236769a78273d3be6d SHA-1: aeb279b33cbab08ee7508ed7b505c9005dce61cc SHA-256: b6a0d7e526ddd3f88663f0bfa1b0b1dc04e552a977b148a310abdb8347e2a16c
224 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1204.002 User Execution: Malicious File

This PDF document was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV detecting it as a phishing trojan. The document employs social engineering tactics, instructing users to press Win+R or paste commands, likely to bypass macro restrictions and execute a secondary payload. It also contains numerous links to potentially compromised websites, suggesting a link farm designed to redirect users to malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16070d612d3d25---pogubakopijawutomakim.pdf In PDF document text
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072cb3d71c1d---96118338714.pdfIn PDF document text
    • http://kwong-cheong.com/userfiles/buganoda.pdfIn PDF document text
    • https://drsubhashawale.com/ckfinder/userfiles/files/12356449021.pdfIn PDF document text
    • http://charugarware.com/DEVELOPMENT/charu_garware/uploaded/userfiles/file/93827235949.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/c295d83f48818e3a236f7156782b9746/dusojojukager.pdfIn PDF document text
    • http://vytvarnyobchod.cz/UserFiles/File/87306242532.pdfIn PDF document text
    • http://dui-antidote.net/images/userfiles/file/34804914070.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/160a6d8c3b18c8---92005711607.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609649682ef90---gipebokit.pdfIn PDF document text
    • https://savitravel.ro/ckfinder/userfiles/files/93905463865.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/moj540967n2kin1714qi9lgjkp/fekewukav.pdfIn PDF document text
    • http://ei-windykacja.pl/upload/file/fuxidoma.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/46cd69f1059bf4fcabb1aa5b7f6a0803/xipaxupifutitifopedasiji.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/160ad4676930e3---84531960538.pdfIn PDF document text
    • https://sheenabusesandcoaches.com/userfiles/file/52295974476.pdfIn PDF document text
    • https://karpataljaturizmus.hu/upload/gidajotenubidelugudan.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b101978c8df---jabovivekiditor.pdfIn PDF document text
    • http://vinhthuan.vn/upload/files/75484508044.pdfIn PDF document text
    • http://gaziogluenerji.com/images_upload/files/vokojilo.pdfIn PDF document text
    • https://angelsforwarriors.org/userfiles/files/79457772645.pdfIn PDF document text
    • http://quadocdao.vn/uploads/files/30861107804.pdfIn PDF document text
    • https://geo-decouverte.kenamedia.ch/ck/ckfinder/userfiles/files/robuwuwusapewonidare.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=uc+browser+for+pc+windows+10+free+download+32+bitPDF link annotation
    • https://mediaget.com/userfiles/files/3376566678.pdfIn PDF document text
    • 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_off0000f00c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF00C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010823.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10823 11312 bytes
SHA-256: 2ea436cb2e812f4ad4bd20f9bf67e2c198a4bf52bc5850bac32db531136b8741
font_02_sfnt_off000122c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122C4 16452 bytes
SHA-256: f1d72e26951e040d81d2168f3d13dcdd7cb7b276aca587b4c2350d73af1ae2a6

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