Malicious PDF — malware analysis report

Static analysis result for SHA-256 00d6dc590847df17…

MALICIOUS

PDF

80.2 KB Created: 2021-07-18 08:55:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8767472ded1019f75201912ddd15b515 SHA-1: 8b8014ee5d2f65ce89affe9fc9b49241e1fedd8f SHA-256: 00d6dc590847df1702bcb0196e52bde15127f67fad24bb51c01b859d6190ecd7
156 Risk Score

Malware Insights

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

The PDF file contains a link farm, with numerous URLs pointing to external sites, many hosted on compromised WordPress installations. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded URLs suggest an attempt to lure users to external resources, which is a common tactic for initial access.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://40parables.com/wp-content/plugins/super-forms/uploads/php/files/13dc95f1e2f52b280814ba3daaed00b2/zurujasazejax.pdf
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/7e79f64bb760643f8f9008dae6b52262/20731082687.pdf
    • https://istanajpdua.com/contents//files/pugitunaje.pdf
    • http://camberwelltaxi.com/survey/userfiles/files/98392059028.pdf
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/8900fcdfe524d3c075f2d4fa7da883b6/bofaxunomagesa.pdf
    • http://chikatere.com/Upload/files/dosezugoz.pdf
    • http://personnelstrategies.net/userfiles/file/xumivoxu.pdf
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/4e3f8251524961ed88cbaccd95902210/331149417.pdf
    • https://qpshouse.com/upload/image/file/kutekupadisixiremi.pdf
    • https://lanhcongnghiepthinhphat.com/upload/files/92873739220.pdf
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/8o07dafeh8vo2pev0p5p75ab3j/37911355305.pdf
    • http://rickgrisolia.com/userfiles/files/7488631947.pdf
    • https://optimuselearningschool.com/learning/site/images/uploadfiles/15948275844.pdf
    • http://domusanna.it/userfiles/files/25508203888.pdf
    • http://global-insurance-broker.de/downloads/jedosofetusedipadevenuzap.pdf
    • https://www.vbclighting.com/wp-content/plugins/super-forms/uploads/php/files/560e39e11915504d5e817f485fd78abd/80749466402.pdf
    • http://dbcasagayathottam.org/assets/uploads/cms_images/files/34799443831.pdf
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/5e1389066e66229d7dc78176b6c266b4/zuxeponuwepu.pdf
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/tn7lovuhevatoq0951uoll6ls5/kokexibu.pdf
    • https://hizlipin.com/calisma2/files/uploads/36951404971.pdf
    • http://humanitool.ru/userfiles/file/65977355009.pdf
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608c8a216f4d2---23997545570.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=what+is+homie+mean
    • 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_off0000d527.bin
47fa67c1e5e6d9b8d5495b3c2a5e9949a464435d96a757e8bf75c730140e6031
pdf-font-stream PDF embedded font (sfnt) at offset 0xD527 10220 bytes
font_01_sfnt_off0000ebf4.bin
a60f26a3e7737321170af6e3fdc065ccb9871fc6d0acb07b17d7a7a22b0d0c53
pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF4 18348 bytes
font_02_sfnt_off00011bd2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11BD2 16792 bytes