Malicious PDF — malware analysis report

Static analysis result for SHA-256 aada944b8e249e04…

MALICIOUS

PDF

118.5 KB Created: 2021-07-01 17:07:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4211a6210225f2f36f165967c3f6f405 SHA-1: 29e9c7f39cf729d38800b068824781f8ba1de4a2 SHA-256: aada944b8e249e04f67202f4fe978e4fc1cb89f2dd1a026cb74c33720ea7a5b8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, many of which point to compromised WordPress sites and are structured as a link farm, suggesting a phishing or malware distribution campaign. The presence of external URIs and link farms indicates an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9639

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 https://archism.ru/uplcv?utm_term=connect+by+loop+in+user+data
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16086655ebcbdd---50211924407.pdf
    • http://toyteepee.com/uploadfiles/file/210629231627818545m1gcmm.pdf
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a84309bcf60---91415528993.pdf
    • http://braciszewska-klimek.pl/fck_files/file/xikugamuxurotuxaxog.pdf
    • http://bugaboo-buffalo.eu/UserFiles/File/7708088359.pdf
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/6faea8951ec3cb29836eba7caf67aae6/silukixukosuruzotetu.pdf
    • https://shared401k.com/wp-content/plugins/super-forms/uploads/php/files/d7bda722e4212a960ee8adae447aa84b/bosalipesikuwu.pdf
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a4e7821c9b4---30897006674.pdf
    • https://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/3k45bnl40h0esgg3v4gi4p8toh/nikagumonaxapuzobakaraxez.pdf
    • http://augustaelectricalwork.com/editorData/file/gijukijotedos.pdf
    • https://aplusadvance.com/naver_editor/data/file/61296028033.pdf
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607434f5bbaec---zikis.pdf
    • http://www.cafeinca.com/img/public/contenido/file/56206899901.pdf
    • https://chris-arnold.com/userfiles/file/4414027360.pdf
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/1607d9a21d7fa4---2071845393.pdf
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1609df5cb90c5c---97744833926.pdf
    • https://tepihtrava.rs//files/18299818485.pdf
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf46619e5d9---fejesukesuxexi.pdf
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/f92508df377682d780914c50a9750c81/bezuveriruzikorusavuw.pdf
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160d2923fe494d---xorasusiru.pdf
    • http://cleanyachts.it/writable/public/userfiles/file/peleviw.pdf
    • https://used-machinetools.ro/app/webroot/files/userfiles/files/vupoxoduwabeba.pdf
    • https://seitonsolutions.com/ci/files/235107207.pdf
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9402e118b---fakimu.pdf
    • http://kezmosas.hu/files/file/94412121203.pdf
    • https://www.vbclighting.com/wp-content/plugins/super-forms/uploads/php/files/184c808ccbad101ea5813c6a4de527cc/61405761767.pdf
    • http://fly.no1-yes.com/userfiles/file/xuravedudin.pdf
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f71c.bin
2798eede143e85be61f37ce3b712e107a6ecba61dc523ffd7316f66a535ec737		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF71C 10892 bytes
font_01_sfnt_off00011044.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11044 16792 bytes
font_02_sfnt_off00012852.bin
362f058956918140454e1e24a380d620e4accb3110407d950674dfb554b0a936		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12852 44020 bytes
font_03_sfnt_off00019bd1.bin
8d82d223efc622ed891e097d909eb0a794979a2f731d734ecb16b394e8e4159a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19BD1 17596 bytes

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