Malicious PDF — malware analysis report

Static analysis result for SHA-256 707c1af9724f236b…

MALICIOUS

PDF

82.8 KB Created: 2021-09-06 15:05:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 2897130a88d204d645b5b0e0842d4ef3 SHA-1: 7be630767cc652c347281e2bdc5d963c497d12da SHA-256: 707c1af9724f236b21a4e26dfa9fe0e97e6731f3ee2a9000471ca5d457bd25eb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a phishing or malware distribution campaign. The presence of embedded JavaScript, though not fully detailed here, indicates potential for malicious scripting to execute.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://healthywithhart.com/res/file/71710589852.pdf In PDF document text
    • http://upasamed.org/Content/uploads/files/gimokeloje.pdfIn PDF document text
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/adfb5d55538adddc368fe0d2e8797c94/76494487767.pdfIn PDF document text
    • https://beruanglucu.com/contents//files/bibefupenalizijadit.pdfIn PDF document text
    • https://pasifikendustriyel.com/userfiles/file/77611967671.pdfIn PDF document text
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/17b3d2efa3a372cfbe01879cb4244c39/jesidirebujifoxapoganalu.pdfIn PDF document text
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/sjuaei02a2ickq7iajgdjdmk61/bekarutetisipamexesofal.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/9vqt7cttekdncpng9k559ql2eg/37672775582.pdfIn PDF document text
    • http://www.redactordecontenidos.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607d1a47ee918---dilagekuxi.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a38cc441ad2---88007527592.pdfIn PDF document text
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/tomasafobafesogetopun.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/2e81e1178ab851aac38e586156dc1b24/19186133556.pdfIn PDF document text
    • http://clinicaveterinariaalbese.eu/userfiles/files/33805900447.pdfIn PDF document text
    • https://mzr-avocats.com/buddha/ckfinder/userfiles/files/95374487617.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606c89d3487e9---96484358023.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/16088f9d735355---bomozidabejametujuji.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607c264781744---42282587909.pdfIn PDF document text
    • http://hindel-relax.ch/ckfinder/userfiles/files/femalokobajogafumasu.pdfIn PDF document text
    • https://saleskerala.com/ckfinder/userfiles/files/52413949695.pdfIn PDF document text
    • https://esportenerd.com/app/webroot/ckfinder/userfiles/files/81164373053.pdfIn PDF document text
    • http://syuncyoku.jp/upload/file/sikezenu.pdfIn PDF document text
    • http://liga-stf.ru/i/upload/files/47446164948.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a80e313b786---xuzokesaxuzujizufasoman.pdfIn PDF document text
    • https://chiataiec.com/userfiles/Proj_Name//files/81058729920.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=ridurre+un+file+pdf+gratisPDF 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_off0000dcd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD3 18348 bytes
SHA-256: 5117adcc944ef6f9dfccf970b96818e4f06db3a3828aeb0834dc390815c2c6b5
font_01_sfnt_off00010d05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D05 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001251c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1251C 10700 bytes
SHA-256: f774705a5d1f7016bc8156b347f1d097771d3d775eb607f4ade3bf88dc574238