Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3b03fad1329e19b…

MALICIOUS

PDF

75.4 KB Created: 2021-09-07 22:51:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: b10bbabc20e271d460daedaca5b82b5b SHA-1: 30854ca4b2588bf748e4e8fc06110ac96aa1312a SHA-256: c3b03fad1329e19bed9889bdc34aacd0564296262ec16c3c0508b1083bb958c7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious by a machine learning classifier and ClamAV. It contains a link farm with numerous URLs, many pointing to compromised websites or disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of embedded links and the overall structure indicate a phishing or malware distribution attempt, likely leveraging a PDF exploit or social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://jhferry.com/data/fckeditor/file///fewesetoborezovodugobif.pdf In PDF document text
    • http://divorcefinance.nl/uploads//file/78863149752.pdfIn PDF document text
    • http://urbanconstructions.org/images/uploadedimages/file/83737109829.pdfIn PDF document text
    • https://0924055971.com/uploads/files/202108270827483717.pdfIn PDF document text
    • http://amexeuro.com/an3_Uploads/file/belavapox.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb3ca3acc70---64389582297.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dabbe47efe8---fitagibofewowolewu.pdfIn PDF document text
    • https://minipowerpack.net/upload/files/ruvokopuwuvowinorebigire.pdfIn PDF document text
    • https://certifiedcollisionrepair.com/home/cert/public_html/ckfinder/userfiles/files/zumukajodobidubu.pdfIn PDF document text
    • http://easyreturn.store/userfiles/file/xodapapip.pdfIn PDF document text
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16096293a8d42c---vidokoxesov.pdfIn PDF document text
    • http://educasters.co/ckfinder/userfiles/files/jotekolonepiserimofel.pdfIn PDF document text
    • https://anukulagrotech.com/userfiles/file/84530334263.pdfIn PDF document text
    • https://fallsplat.se/file/93801019300.pdfIn PDF document text
    • http://casier-a-bouteilles.com/file/sozonoporowunejofefegipi.pdfIn PDF document text
    • http://kronikarp.pl/ckfinder/userfiles/files/dosesalomatalipexes.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160818fa22564b---nilebulovusidolut.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e708189156---ranepo.pdfIn PDF document text
    • http://geometrarontani.it/userfiles/files/suponaxunibowadotub.pdfIn PDF document text
    • http://fujavietnam.com/images/Download/lotozevilasozanibimuxuze.pdfIn PDF document text
    • http://phuocthuan.vn/images/pic/file/gigetajesadinat.pdfIn PDF document text
    • http://thepokewave.com/uploads/files/lopikan.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=instruction+manual+for+iphone+8sPDF 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_off0000c3a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3A4 11004 bytes
SHA-256: 7e05e66d89a56a60f8f5fc318d4a6a7f1c55cdda3a1c05d71b76204c7853f4a6
font_01_sfnt_off0000dd06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD06 16704 bytes
SHA-256: c995304c072f3232f79d4ed4be2b866422196305d18747f22b860a1d0aa7674d
font_02_sfnt_off000107c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107C1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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