Malicious PDF — malware analysis report

Static analysis result for SHA-256 7df6cfded381e098…

MALICIOUS

PDF

92.2 KB Created: 2021-06-27 14:00:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b897e9d45bd29296481fbf20ec62d91d SHA-1: a4e6ad04854e72af37850a6e76f45aa818711895 SHA-256: 7df6cfded381e0985b028d950c1bfd9e90465799e1c7f3e2f00d855eb7bd4deb
156 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm with numerous URLs pointing to potentially compromised WordPress sites, likely intended to lure users to malicious content. The document body is unreadable, but the heuristic firings strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b87b3463c5e---fitujira.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160760f1be27a6---84193164419.pdf
    • https://www.taxiserviceh24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bff93764deb---62933806201.pdf
    • https://www.tanyadantus.com/wp-content/plugins/super-forms/uploads/php/files/bb5ad2f2bb8d5ce8d2350674237c16ef/tejul.pdf
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16080a0081935e---sapazebolulap.pdf
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c63e0312a61---xetixo.pdf
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/a8378a87cbc1b0626126569699183a3d/merewokebepukafiz.pdf
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079a28a954a1---14684309985.pdf
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a9b1cd628f---xagafazigebisazo.pdf
    • https://alexandrapanayotou.com/web/images/static/file/sosunelepipi.pdf
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/93c7aa943debaf516748355d0d1c0d05/nafajutekakasalobobemip.pdf
    • http://bmhs71.com/clients/c/c9/c97ff408e01126d63256cf68004d6641/File/bowefojujapiragibiw.pdf
    • http://harchovyk.com/userfiles/file/gifimufupoxup.pdf
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd8ce70fc9---xeriza.pdf
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160a351267e3c8---besutobaxifed.pdf
    • http://kythuatviet.vn/uploads/userfiles/file/kedopuvokafenunotebatuwor.pdf
    • http://permianhighschool1970.com/clients/e/ef/efee9fcbc667252fc4b649c8163d3733/File/3486392751.pdf
    • http://asfalon.com/__files/file/74916763043.pdf
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/722c37155903a491c1de4b00f1865628/sinanoxozapisej.pdf
    • http://valleypainclinic.org/userfiles/file/73135901223.pdf
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/4b30c28518955c969cb673ac204e50ef/22054091571.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=what+is+12+oz+in+ml
    • 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_off0000e8f1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F1 16792 bytes
font_01_sfnt_off00010103.bin
abbfc96614cd21a7ba96210ce2a071cc89956b2263eb87bf91a1e9e0421c4ad1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10103 20536 bytes
font_02_sfnt_off0001334d.bin
a096859e9a372ec39a52bfbd51e54e6f61334ab9096959a3cddb5a9572770645
pdf-font-stream PDF embedded font (sfnt) at offset 0x1334D 16908 bytes
font_03_sfnt_off00014c04.bin
0b6dff277840eb103df75ffcf71ae1620e942b4e25563c1d2c789e6795befd91
pdf-font-stream PDF embedded font (sfnt) at offset 0x14C04 10364 bytes