Malicious PDF — malware analysis report

Static analysis result for SHA-256 94dd66efc5949326…

MALICIOUS

PDF

79.4 KB Created: 2021-06-28 08:03:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: addd4523603c48ea1f8eebde57280e96 SHA-1: 4b01d403efc5e5ed20bb06771a578c8ca5d03d5f SHA-256: 94dd66efc59493265ddeedd4941939992b4cb0eafa7928fc210c5b5a5270c603
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting it functions as a link farm for phishing or malware distribution. The presence of embedded URLs and the overall structure strongly suggest it's part of a phishing campaign, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://infrive.ru/uplcv?utm_term=red+hair+gay+video
    • http://pinturasoltra.com/images/slider/files/83735615672.pdf
    • http://cec-intl.ru/app/webroot/files/file/13169601053.pdf
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bc9646baf8a---106380703.pdf
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ba933503ec---59574394327.pdf
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/56ce1039b4b578036e02478cbb555597/60018765347.pdf
    • https://chameleoncoupons.com/adgprocessing/uploads/files/59332198628.pdf
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/264184a2b6bc6b5bc66aa245b11443df/62278295654.pdf
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/63442ac308c486832cd9c67f5ee7db89/tepobiwajubadugaxanisu.pdf
    • http://xn--80aafkqcanfpgnhbng3b5i9a.xn--p1ai/pict/file/tatugikusemivelemovepiweg.pdf
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606cfd4ad8e78---papazetozixugakiwowix.pdf
    • http://ambulatorioveterinariorigolon.eu/userfiles/files/95275751531.pdf
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5297b6485a---sufisazof.pdf
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1a29105389---rurunizex.pdf
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160833b80ab6d0---89927586498.pdf
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7ad7f95a80---9330610623.pdf
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/p2tc962rkd4jm03msoasbdnc35/32700024363.pdf
    • http://abwlanham.com/uploads/files/wutefatumakuteramexewu.pdf
    • http://www.sport-konyv.hu/userfiles/file/4592180099.pdf
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/39947edf198b9520fba378f854511783/33655906079.pdf
    • https://dietacud.eu/upload/file/10121891901.pdf
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/p5budqdp60gcfj38ct52h4bulr/68385960981.pdf
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607a3809192f8---20267006559.pdf
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/c8e69ac8ef134155051371e3d19df5c9/sewumaxo.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_off0000d47b.bin
5c728d3974da12384da61432a198689042bd2fa145374d802abd1b2af389cd20
pdf-font-stream PDF embedded font (sfnt) at offset 0xD47B 10336 bytes
font_01_sfnt_off0000ebbd.bin
d9e010c36447f08f7529915ce9e64e053f6bbcd7c6e08da8b777344c0bdbe11a
pdf-font-stream PDF embedded font (sfnt) at offset 0xEBBD 16704 bytes
font_02_sfnt_off00011718.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11718 16792 bytes