Malicious PDF — malware analysis report

Static analysis result for SHA-256 fda0e8775bc0b71a…

MALICIOUS

PDF

76.2 KB Created: 2021-09-13 03:23:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 14e29dd53395b88dd2681237db77c739 SHA-1: fe3c423ebb22b557a56cbed079c6bd90f6d43a6b SHA-256: fda0e8775bc0b71aa72f8ff3ba7bca5f8250f91022d9d6e640ab00ecc798b98b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm pointing to multiple compromised websites and disposable hosting, suggesting an attempt to distribute malicious files. The presence of a 'download button' heuristic further supports a lure-based attack pattern. ClamAV detection and ML classification strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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
  • 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.
  • 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://achilleferolla.it/userfiles/files/jafawalatuxonepevirase.pdf
    • http://johnlillylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/rivevebelaxe.pdf
    • http://termosystem.pl/userfiles/file/jomevizotabefupibizawe.pdf
    • http://m2m2design.com/userfiles/19461695650.pdf
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c22c4524b7---26401517524.pdf
    • http://balmybnb.com/t/tutorfirm/uploads/ck/files/84143297050.pdf
    • https://trade.inter-ural.ru/ckfinder/userfiles/files/34749306717.pdf
    • http://mq-water.net/upload/vofelefabagu.pdf
    • http://fuzoku-kyujin.jp/ckfinder/userfiles/files/82425260058.pdf
    • https://aldapa.eus/files/galeria/files/84898953174.pdf
    • http://nikacarpet.nikacarpet.com/My_Project/Hamishe_bahar/ahar_img/files/22969767009.pdf
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b9498c2993---1407901855.pdf
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/fsau18br6urvkeik2s7qs03ic7/ditex.pdf
    • http://atoutslegion.com/userfiles/file/83306343712.pdf
    • http://iburgisidimarsala.eu/userfiles/files/81823689251.pdf
    • http://lawyergz.net/uploadfile/files/bufigulafetipex.pdf
    • http://labsshop.com/d/files/dogekopizamukidomaj.pdf
    • http://ruihuitax.com/files/file/87379705396.pdf
    • http://gzafjc.com/uploadfile/files/fifanet.pdf
    • http://inkjetartandimage.com/Uploads/file/40573830661.pdf
    • https://xn----7sbbg1ddpkdc.xn--j1amh/uploads/files/wifedejitorin.pdf
    • http://ateliergermain.club/sites/default/files/file/xemanajopezodisajapogaxe.pdf
    • https://aparcaderoshaddaichile.cl/uploads/images/files/lejufusulelibeduran.pdf
    • http://brucemayrockinstitute.com/assets/ckfinder/core/connector/php/uploads/files/18063992210.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=clash+of+clans+hack+unlimited+resources
    • 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_off0000c5c5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xC5C5 16792 bytes
font_01_sfnt_off0000dddc.bin
9303a9d3c3bd67b59b224c04369b4661fb16595ebd1ebc32f3ee0e1324960241
pdf-font-stream PDF embedded font (sfnt) at offset 0xDDDC 10964 bytes
font_02_sfnt_off0000f71f.bin
7479b3c45390f030ec62b95f63aa321ed276ea2c5872fca34e5f7d882cb0f024
pdf-font-stream PDF embedded font (sfnt) at offset 0xF71F 17060 bytes