Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a2e3919aa786f18…

MALICIOUS

PDF

90.1 KB Created: 2021-07-29 19:22:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9c354819cea796b97e0e19c497457bcc SHA-1: 80874fc76f96cd71e1b4b27f605180cf1a179823 SHA-256: 5a2e3919aa786f182a09654dd73296a3476c2d3ea434f3e675c1fa393fcffcfe
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting it functions as a link farm for phishing or malware distribution. ClamAV detected this as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. While no scripts were explicitly extracted, the nature of the links and the detection names indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9930

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 http://mirandatutoringcentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607e5d70e8a04---zozapelujudogelajeva.pdf
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160d686125fca0---99913917693.pdf
    • http://livingkaneohe.com/userimages/40885039896.pdf
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/6uathi8fq3baurbsk26ieec0f2/318296120.pdf
    • http://sushigonewildtogo.com/uploads/files/35719819894.pdf
    • https://kristinanamaste.eu/files/86792657745.pdf
    • https://ijmscr.com/ckfinder/userfiles/files/xudages.pdf
    • http://sevoir.hu/uploads/file/71791589986.pdf
    • http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a5af365511c---mupulexomufuwij.pdf
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/mf8hv6akijrirlhgrskgj54v51/98993242850.pdf
    • http://hometextiles-consultant.com/ckfinder/userfiles/files/wexenojudifawudu.pdf
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c0e9e966ce5---bosunuxefanedosajafazuxa.pdf
    • https://nazragame.com/calisma2/files/uploads/rivuxivimolemuli.pdf
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/ee7lr7uf8faife1bdl7ab8ae21/84314926554.pdf
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/1607954bc85e3b---10018334340.pdf
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160bfa12b7f03f---43336114638.pdf
    • https://cahayamimpi1.com/contents//files/92512851974.pdf
    • https://twr1115.net/files/fckeditor/file/sozijim.pdf
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afc17d29ba3---safopulowujito.pdf
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160906c5691dde---47905226654.pdf
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/145dc1a9383d634c4d542cebd67e0754/97411325389.pdf
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/h0c69hoocjthls0q441vbupb33/4413476004.pdf
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f04da48686e---jalakodazufigerof.pdf
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ab19b8d8e4a---ninodusijosawazut.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=pokemon+go+spoofer+ios+download+2020
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2b3.bin
72bda604c77ca771a1a14ee35dc8ff354b9f00ec81e947fe844e91f3a29209ee
pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B3 1684 bytes
font_01_sfnt_off0000fab6.bin
7c2f55da47074754550f43320139a2636a8e564260912bdce609c8b2767a93d6
pdf-font-stream PDF embedded font (sfnt) at offset 0xFAB6 17300 bytes
font_02_sfnt_off000127d6.bin
c3c5bb1d3f38a22ad980c5032dbbe53aea4325b411a72a8920234e2e39f54bbd
pdf-font-stream PDF embedded font (sfnt) at offset 0x127D6 11164 bytes
font_03_sfnt_off000141d0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x141D0 16792 bytes