Malicious PDF — malware analysis report

Static analysis result for SHA-256 da69a8cbbab23e6d…

MALICIOUS

PDF

71.7 KB Created: 2021-09-07 10:11:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 329c562fa3b2bb7da3babe77f121579e SHA-1: cb9a730ec761e0effeaecf10ac0440c7f478787d SHA-256: da69a8cbbab23e6d1e31357153b470ddb1d3645d6981ea5cda5e1ab65220c924
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains a link farm with numerous external URIs, many pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to distribute malicious content or phish users. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/36971215aa81b7806fea742faa8885e7/fifepawotige.pdf In PDF document text
    • http://cesishotel.com/res/wysiwyg/file/jezobo.pdfIn PDF document text
    • http://viswinkelindex.nl/images/uploads/zevaturekesuduvebutaxes.pdfIn PDF document text
    • https://transport-vehicules.fr/userfiles/file/3439838948.pdfIn PDF document text
    • https://aymfly.com/aym_image/files/50702765833.pdfIn PDF document text
    • http://innotec-industrie.be/userfiles/file/buvamudujivi.pdfIn PDF document text
    • http://babamoleskine.com/files/file/44377944473.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607adb3952707---wuwavetexav.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/b7id4b3ts1g8k8ecor1h2kdmv0/temele.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c6747266a54---59381386159.pdfIn PDF document text
    • https://birudongker.com/contents/files/96507924124.pdfIn PDF document text
    • http://pro-elec.ru/ckfinder/userfiles/files/46930501983.pdfIn PDF document text
    • http://dieukhactransam.com/uploads/files/kekizujevavomewiri.pdfIn PDF document text
    • http://shosholoza.de/file/magig.pdfIn PDF document text
    • http://96rangjai.com/userfiles/file/tujaz.pdfIn PDF document text
    • http://giasudaihocsupham.com/Images_upload/files/86416459919.pdfIn PDF document text
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073086bf3853---72967817417.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160815bb4ceb2d---sesizokogigekasodar.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ab67f362128---36940773322.pdfIn PDF document text
    • http://penzionnakrizankach.cz/ckfinder/userfiles/files/92182440042.pdfIn PDF document text
    • https://dhins.com/testingsites/advantage_aviation/assets/media/file/16260439189.pdfIn PDF document text
    • https://beautydiction.com/ckfinder/userfiles/files/wigebigemovutuf.pdfIn PDF document text
    • http://omni-links-europe.com/soxokixaneborarukuloluf.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/4f0211f9a42398e09413a2a78cbff80d/66483870147.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072efc728fb6---roriwutobalabigub.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=chapter+13+psychological+disorders+worksheet+answersPDF 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_off0000b6d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6D4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ceeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEEB 11340 bytes
SHA-256: 6deff26bbca36192fcc7f899fdaaf2f6a1b2e2c744001060772f44e1b990b7b2
font_02_sfnt_off0000e982.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE982 15944 bytes
SHA-256: 38588eac7d1e5868a39d2a1cfa9339e18a7e439fec6d0e803989cea20910b031

Open this report in the interactive analyzer, or submit your own file for analysis.