Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2b32c9a3166f6d5…

MALICIOUS

PDF

87.8 KB Created: 2021-07-02 05:21:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: c1f3b41a3816f853b3cd9954402d4a0f SHA-1: daec5d1854bbab9dfe755b6601d3dcb27c8bde98 SHA-256: d2b32c9a3166f6d5c4309ebe780d935ffe6602e931df7adc439a67039a87f1fe
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a link farm pointing to numerous compromised WordPress upload directories and disposable hosting sites. This behavior is indicative of a phishing or redirection campaign, likely intended to lead users to malicious content or further stages of an attack. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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 http://summitremodelinginc.com/userfiles/files/zozedidodot.pdf In PDF document text
    • http://fbchitchcock.org/clients/8/8b/8bdff38a390027835eb24981312b950c/File/88677907418.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087563f3a64f---26975874350.pdfIn PDF document text
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/9113b63160875b510c883a8bc8f4cbb8/24925319545.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/6f1cf530029eeacb9900f45628328a46/mavotomivimevelu.pdfIn PDF document text
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/55bf9fe8589b0393a373dfe8095856d7/topetupafudiwiguwupili.pdfIn PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/252400b59b140133c6f32d5283f84236/rawemoxisenunowisodikureb.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/k2lh9l2a1jkbjnvapnmm405r8g/98361913644.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/550ba11b5da0bcbe35c32c787ce2e95f/viruwubivalabewimijej.pdfIn PDF document text
    • https://protechlighting.com/wp-content/plugins/super-forms/uploads/php/files/cb7c4413da19fc63510d74be8faf44b2/jusaw.pdfIn PDF document text
    • https://aquafilling.com/userfiles/file/wabojofasikabedadodi.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/17568083520.pdfIn PDF document text
    • http://vasvaripalmuzeum.hu/upload/file/17299825247.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/tezaraxisa.pdfIn PDF document text
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/dc6abbea195fb00ab0189e164a502160/94613121426.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/d5ffc212fa198a902d79536a8adc39b1/32884726819.pdfIn PDF document text
    • https://al-farh-iq.com/upload/userfiles/file/49080528459.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609639fdc98fe---37329443921.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b46a06a12d---pojuvuguge.pdfIn PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/14c12d78ac0d8e86985803f497ff1b76/63546578220.pdfIn PDF document text
    • http://afgventuregroup.com/cfiles/file/paxam.pdfIn PDF document text
    • http://3sdent.com/upload/files/janen.pdfIn PDF document text
    • https://www.lightingsolutionsal.com/wp-content/plugins/super-forms/uploads/php/files/ae24029dc0a507d2bb8a88822168bf4e/97552037419.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160cb57db996e3---jabebavapukokev.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d89588321ab---39285612081.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4d69273280---jusizibezab.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=coding+and+decoding+meaningPDF link annotation
    • 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_off0000f2f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010b0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B0B 10332 bytes
SHA-256: f3074ad7dbd6c258d73d7d7d6a7d176bf42d2ded66e58679af317af988951ccf
font_02_sfnt_off00012212.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12212 18092 bytes
SHA-256: 6d7742998d52062c9d35f4c9113fbcfab658db030c219f7a32faf2171bc27114