Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dca984d2076fc6a…

MALICIOUS

PDF

94.4 KB Created: 2021-07-04 10:12:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ee7f525b419a37f4006710140d000218 SHA-1: 45a52865dd7b5e4f5b8bd094a2f85889b2b6b7b7 SHA-256: 9dca984d2076fc6aa78e75f0d082cd2ccfe125625946c0181df0eae50c4cd0a8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload storage or disposable hosting, indicating a link farm designed to distribute traffic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of an attempt to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9927

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://st-johnson.com/Uploadfiles/files/6671128919.pdf
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/160bbf3ed1cc27---bogajazipuxito.pdf
    • https://drvishweshwari.in/userfiles/file/labufisuxatigeximajaxew.pdf
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/a4e3e5b800693f7785a649f28a538e4b/1002031300.pdf
    • https://eternalbliss.net/file/subepabokulibulo.pdf
    • http://www.pilonidalsinus.gen.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf2cda549a---18250919553.pdf
    • http://dishandspoonproductions.com/ckfinder/userfiles/files/89154195121.pdf
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/ff29f9ddd27220ccec831a385f3bee45/dobibinidixusajewozorapo.pdf
    • https://mebelihome.ru/upload_picture/xogivu.pdf
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/6pst9pu8v7ps8f5ko673bmvhsq/15219406556.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad99ea609cf---18305281576.pdf
    • https://rajatotogroup1.com/contents//files/devadowogitego.pdf
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16088fe528aeff---zomakufijogisuvarofomij.pdf
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606d47f72de31---92394991068.pdf
    • https://areicon.com/images/file/wogosesosejudukewafezi.pdf
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/v7jpg79alek3uvdao0rju0r4f5/lopasarinanitod.pdf
    • http://teifsepahan.com/files/file/11779559284.pdf
    • https://fourseasons.events/wp-content/plugins/super-forms/uploads/php/files/233f55e8a58becfe0f2697dd5a8d06dc/zatadekasolixuxelimegix.pdf
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/d0c73b30baf7312f838323c18478ed2b/99413362871.pdf
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072ff6a97b32---69990928714.pdf
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/ku0b9t6hamdrf55lkv4ofq99rd/36377791365.pdf
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608484c2b26b0---gumobapu.pdf
    • https://aonetreks.com/uploads/file/44079082291.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=fallout+3+weapons+guide
    • 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_off00010179.bin
562d39cc93351683f3420870a5578826c1285db13c691c08f99be18f4980e560
pdf-font-stream PDF embedded font (sfnt) at offset 0x10179 1860 bytes
font_01_sfnt_off00010a2b.bin
aeaf6833a86df79e008635de21d8956d191f33d31cd82c5ef5d00eaaedb2f023
pdf-font-stream PDF embedded font (sfnt) at offset 0x10A2B 19216 bytes
font_02_sfnt_off00013b06.bin
99637fce6b571ebdb2027da624258eee4105568108529f7dd64032ec457fd8bb
pdf-font-stream PDF embedded font (sfnt) at offset 0x13B06 10800 bytes
font_03_sfnt_off000153ed.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x153ED 16792 bytes