Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c382575bea46d86…

MALICIOUS

PDF

95.4 KB Created: 2021-07-31 08:11:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: a92a274344c98dbb4fa2ee1ee401ddfe SHA-1: b1cc2bd3f863e00603b0c5a1e8be0ab59d922e46 SHA-256: 2c382575bea46d86ba9069acec79f699a0b199691778df9857760ce5afae117d
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous external links, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the nature of the links suggests a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 5

  • 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://synerhu.ru/uplcv?utm_term=practicing+the+power+welcoming+the+gifts+of+the+holy+spirit+in+your+life+pdf PDF link annotation
    • https://avigailpekelman.com/sites/default/files/file/gamepasorar.pdfIn PDF document text
    • http://sovaimm.it/userfiles/files/23595410568.pdfIn PDF document text
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/d8lcig37a265lru5n810mlobr2/79515701514.pdfIn PDF document text
    • http://murphysbeads.com/clients/54316/File/8743259866.pdfIn PDF document text
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/83c4ec129539278633c77385225a023b/zuledep.pdfIn PDF document text
    • https://aedwea.com/upload/foto/72864975919.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608925713f714---jexovozanede.pdfIn PDF document text
    • http://dongfangguohua.com/ckfinder/userfiles/files/joniresifevike.pdfIn PDF document text
    • http://namngonviet.vn/user-/files/tazilokujevomo.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/12264488617.pdfIn PDF document text
    • http://allaboutdowney.com/userimages/lifixavodinamaruxu.pdfIn PDF document text
    • http://avandcie-automation.fr/ckfinder/userfiles/files/xebewema.pdfIn PDF document text
    • https://chaplains-camps.org/upload_picture/file/17519948377.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/n682u73jqjo9rd45sddtke1sb5/30606118437.pdfIn PDF document text
    • http://alliance-ic.ru/uploads/file/31904069701.pdfIn PDF document text
    • https://numen-wow.com/userfiles/cloud//files/disopumetufapovesoga.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/79165c547165995b9d50153daa564fb5/43066104444.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//jofuvutalexes.pdfIn PDF document text
    • http://edelstar-mos.ru/files/mononapojaba.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/2531442b377307eaa2c69c352b832b87/90176416259.pdfIn PDF document text
    • https://apotekatia.ba/fajlovi/nemawabeja.pdfIn PDF document text
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/427ac3074442b788135fae0c57fcba0f/10863423722.pdfIn PDF document text
    • https://www.ideaklinikbursa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160813366a551e---filixagola.pdfIn PDF document text
    • https://laplacedesstores.com/upload/file/xazigovefiv.pdfIn PDF document text
    • https://anmimar.com/royal/userfiles/file/lanirolovuvi.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_off00010b2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B2B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012342.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12342 11368 bytes
SHA-256: 6bf3f6fbc2bde880c88b2f137acaf736a103cf175ede583baa84397c66fd409b
font_02_sfnt_off00013db2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DB2 18188 bytes
SHA-256: b68464e65ded51ddf146ba076335088a98f188af0083a867c0012861b9ce6b7e