Malicious PDF — malware analysis report

Static analysis result for SHA-256 70c7f11b7faabd31…

MALICIOUS

PDF

79.6 KB Created: 2021-09-17 14:12:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 0a561660d36e5b10540aea6e528b785c SHA-1: fdefc213370c366f1f04b31dae244b321879f717 SHA-256: 70c7f11b7faabd317c2cf9ce9cf3fab407e1da3df4c8b4acfa467ba4fbabfddc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external links, many pointing to compromised WordPress upload directories or disposable hosting, suggesting a link farm used for phishing or malware distribution. The presence of embedded URLs and the overall structure point towards a spearphishing attachment attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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 https://catamma.ru/uplcv?utm_term=the+picture+bible+pdf+free+download PDF link annotation
    • http://geodeslaboratori.eu/userfiles/files/ridamigotimevorutuxuwes.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140bf2435238---xativapotegabatonul.pdfIn PDF document text
    • http://ilkjv.com/Images/Media/files/luxukureselasanofugir.pdfIn PDF document text
    • https://am-system.eu/ckfinder/userfiles/files/mewipukatetikudeze.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/tivudugolotozebadomi.pdfIn PDF document text
    • http://ain.proximeo.com/ckfinder/userfiles/files/xemofasepejebo.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/aaf48bcf652e4c225e9f9d0ae8dc653b/wabosekowi.pdfIn PDF document text
    • http://op-gold.com/ck_image/files/duvekofibikofodamiripupus.pdfIn PDF document text
    • http://ps-chiptuning.hu/userfiles/files/65643234367.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130614f1ec0c---91897834894.pdfIn PDF document text
    • http://stomerijindex.nl/images/uploads/28196426543.pdfIn PDF document text
    • https://gizaviation.com/uploads/files/27668627935.pdfIn PDF document text
    • http://enricobarraco.com/files/pokofonekijudegada.pdfIn PDF document text
    • https://chrmglobal.com/userfiles/file/geniwozeler.pdfIn PDF document text
    • http://www.boldino-hotel.com/ckfinder/userfiles/files/70910002548.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/568a7d1c417245efa4184bee24d5efd7/fowokibekafaxizeduvufoso.pdfIn PDF document text
    • https://ketdoanbus.com/webroot/img/files/32051152350.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/161412100132ee---7980587632.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/ih3abitlpocci81idlra1bqokj/fefilulotokadogajexidoki.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/1612eac0cf015a---43121707796.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/f2c2e21363ceb4691affba8ecbefad1b/vefusezetaxadujetas.pdfIn PDF document text
    • https://baptistfriends.org/media/29490574773.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e1938cf2d3---54664976561.pdfIn PDF document text
    • 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_off0000d36c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD36C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eb83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB83 10836 bytes
SHA-256: 4614f6814bc8f55b9608c437af906f08eb5aae86e55dc3f48b08aa93d53c9c65
font_02_sfnt_off00010444.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10444 17184 bytes
SHA-256: 1b2d8cb44d0da23ce8cac93a1358dd07f16657196b843cc9eeff465e9aa677b9

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