Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bbd77646d5771dc…

MALICIOUS

PDF

90.7 KB Created: 2021-06-27 03:46:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f06b5d543ba9b9b42bc6671e2b24a1eb SHA-1: 90c8bef11c18c4d04f073c11b587a4e45b17bfc2 SHA-256: 0bbd77646d5771dc28c4be87ffa829db2485ab6c707385db98131c451430460d
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a 'Pdf.Phishing.Trojan'. The document functions as a link farm, containing numerous URLs pointing to external resources, many of which are hosted on compromised WordPress sites. These links are likely intended to lead users to phishing pages or download further malicious content.

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://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070c6800c099---gedaxabuxogiwulojaz.pdf
    • http://xn--80aaeiengkwpz6p.xn--p1ai/pub/file/mebomaduje.pdf
    • https://medicentrumnz.eu/medicentrum/files/file/45625715651.pdf
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16097ac612c333---73306522768.pdf
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160c5e35748d6d---78341793340.pdf
    • http://contextuae.com/resimler/files/58299641403.pdf
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/m4qj1m9cfp0537rrga5tqd5gg5/30849414200.pdf
    • http://originalcheck.it/public/img_admin/file///neredazufopezoluzosapiv.pdf
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c11eccb8ac4---3129777251.pdf
    • https://dnmpaint.com/sdcc/images/file/pedigu.pdf
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d344f00d4f7---dirasax.pdf
    • http://voxel-avocats.fr/uploads/file/40840328178.pdf
    • http://alphanaturehk.com/userfiles/file/85640550223.pdf
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fea143128f---69354924630.pdf
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5b3235f75b---12888435139.pdf
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b81074f09f8---88077993544.pdf
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf42951b5ef---bekolesadibit.pdf
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/01maurta6ivisfg575k3ihl2n0/34965695181.pdf
    • http://mdbim.pl/ubezpiecz/obrazy/file/90580843436.pdf
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/cs4pq7bm3g6cajn14vgsiv0ufn/tixiwugemuweroxof.pdf
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/16082d5e6d3a9a---8577011138.pdf
    • https://chris-arnold.com/userfiles/file/sagujaxabi.pdf
    • https://cecprint.com/images/file/sedojisewujup.pdf
    • http://www.electricman.in/demo/frontend/web/uploads/files/51720903951.pdf
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16078c2704d61c---60146906061.pdf
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/e53acc4391d697b5c892d21e7abc8c4c/74518600011.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=physical+changes+in+early+adulthood
    • 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_off0000ff9e.bin
ec9ac884cf7d3d7136a2da8bde66c678dc8ea992568ffa16d1a2887a4ba5e70e
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF9E 17124 bytes
font_01_sfnt_off00012c12.bin
47970702771a3ecf2dd4b53629fe22d2e45c77be3b3b63533e298c8d55432975
pdf-font-stream PDF embedded font (sfnt) at offset 0x12C12 10864 bytes
font_02_sfnt_off000144f6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x144F6 16792 bytes