Malicious PDF — malware analysis report

Static analysis result for SHA-256 48014d9a1c119ebd…

MALICIOUS

PDF

85.4 KB Created: 2021-08-18 13:33:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 674f9950e4dbb558bb3826a241fcacba SHA-1: d6af1a8aa8c3ff6150e52cb2841a3c68b23dbb69 SHA-256: 48014d9a1c119ebdd7b4ed63f021e93d0fd8c917b5f883a383cafb32cc4deb5e
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection (Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0) and an ML classifier indicating maliciousness. It contains numerous external URIs and links to compromised CMS uploads, suggesting it's designed to redirect users to malicious sites. The presence of these links and the overall structure point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://pistant.ru/uplcv?utm_term=evangelio+de+felipe+completo+pdf
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16097d5b5b6825---6416488686.pdf
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b62c8bb38bb---saweg.pdf
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/5urqqrtauo7076silhol06ujc5/votepevuzesaxujobaramun.pdf
    • https://bayardplaza.co.uk/wp-content/plugins/super-forms/uploads/php/files/9soqjhn51vqa6amvfjimk73k67/57762050357.pdf
    • http://loca-granderoue-montaletang.com/ckfinder/userfiles/files/rewajosumijubiwoxojilobi.pdf
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6542ea35c9---zopagizasej.pdf
    • https://arnetbilgisayar.com/upload/ckfinder/files/vuvoz.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2a45f5ee7d---1297161095.pdf
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/b182423d785bdeb2567a54a07ac94e66/jaxadato.pdf
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/svq4bqdutfglng64hcmn9irdo8/53748468385.pdf
    • http://teifsepahan.com/files/file/75541634335.pdf
    • http://nwatchonline.org/userfiles/file/gimutojoxukuxewezizuj.pdf
    • https://bloomlight.pl/_bloom/file/10045019253.pdf
    • https://eventpro-kontraktorpameran.com/uploaded/files/70937413936.pdf
    • https://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1606fcbe1e26d9---43372922307.pdf
    • http://fsoa.cn/userfiles/file/pupudopobut.pdf
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6b23e554d8---vifirotegugemodu.pdf
    • http://terredellamagnagrecia.com/userfiles/files/kigaj.pdf
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609f1efe1ff12---xomusidagopabe.pdf
    • http://polishingmarblefloor.it/userfiles/files/33511832576.pdf
    • http://gramercy-grand.ru/files/file/tanafasowidazerorod.pdf
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/eff6865e534a5d405bdb96f6c3a09541/zowasojipevapukexuna.pdf
    • http://alpanelektrik.com/depo/sayfaresim/file/povarukodowuxusin.pdf
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/687465ef56967252d35e75ef53b8c437/mamukitikegulabor.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ddb3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDDB3 16792 bytes
font_01_sfnt_off0000f5c5.bin
b002cd1c1e07e36b25b57f078b94cf651091c7edf9192608211f098ef5b114ec
pdf-font-stream PDF embedded font (sfnt) at offset 0xF5C5 22948 bytes
font_02_sfnt_off00012e36.bin
b16f5af1bf5dac05348e72ea12999d1d66bbbb906424642fce53976b72c96d69
pdf-font-stream PDF embedded font (sfnt) at offset 0x12E36 10744 bytes