Malicious PDF — malware analysis report

Static analysis result for SHA-256 553c3906b851f7ad…

MALICIOUS

PDF

89.7 KB Created: 2021-07-05 21:02:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 94c76f90d61ae982efb57375999d48b6 SHA-1: bb3bd849a3c2b0ef5ad1d907a567987efc491c2d SHA-256: 553c3906b851f7ad2d06f4d9262bf6c34fc6a538d803d6da62d591c4e5d824bf
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of an advance-fee scam, leveraging lures related to lotteries, prizes, or parcel deliveries. The presence of numerous external links, many pointing to compromised CMS upload storage or disposable hosting, suggests an attempt to redirect users to malicious content or phishing pages. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://agiusfuneraldirectors.com/files/file/83587455866.pdf
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e6ea0c1feb---80974275829.pdf
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/16092599b3d4a9---gisulatepabowo.pdf
    • http://www.moyekolodin.com/files/kogak.pdf
    • http://dbjhockeytournament.com/clients/f/f9/f9ff496842c877cbb4522510b668f2a2/File/6831270618.pdf
    • https://a2designbg.com/userfiles/file/nekejinafiro.pdf
    • https://dermatologie-francophone.com/userfiles/file/25016757171.pdf
    • http://miraesusan.com/ckupload/files/paginefugidupe.pdf
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/80s3s3gon48iqd9s86q3hk81mj/fesifazesidubepina.pdf
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/sbr8vorl4vdh7a1gjthbq75kd1/lovidatufotudu.pdf
    • http://darec.sk/files/files/razitored.pdf
    • http://aliceinformaticasrl.com/user/pages/kekufufozeligix.pdf
    • https://boumqueur-edition.com/upload/fckeditor/file/69311109361.pdf
    • https://balajitutorial.com/admin/userfiles/file/kokanutileviludaxajuki.pdf
    • http://bhk-aindling.com/userfiles/files/podanigavamikukoxida.pdf
    • http://johnsonsdynastyincfamilyassociation.com/clients/10108/File/65294972080.pdf
    • https://www.treehousecare.org/wp-content/plugins/formcraft/file-upload/server/content/files/16071017396b55---43766083581.pdf
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c24544496e5---tukidanumidudipeberurez.pdf
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/0dd1306d26c8e47e0d4525e8b2545c6a/51626958019.pdf
    • https://tripleccompanies.com/wp-content/plugins/super-forms/uploads/php/files/0ba910639e5d56eaf0451cac8da9c98f/kidumufemekanafusanure.pdf
    • http://nanobubblevietnam.com/uploads/userfiles/file/7752798617.pdf
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/160832c0443f55---powabururazefakotupe.pdf
    • https://gachbinhduong.com/upload/file/28790954831.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=the+great+british+sewing+bee+free+patterns
    • 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_off0000f764.bin
622d841418b6c77d399753878e1eedce93b163bd980ca40d6ab4409575ff006f
pdf-font-stream PDF embedded font (sfnt) at offset 0xF764 18556 bytes
font_01_sfnt_off0001274f.bin
5dcddcafa158ba056b88726a63bcea2ead4b34c047ad99572bca10f4e573e96a
pdf-font-stream PDF embedded font (sfnt) at offset 0x1274F 10660 bytes
font_02_sfnt_off00013f87.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13F87 16792 bytes