Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e5abd629d82233b…

MALICIOUS

PDF

74.1 KB Created: 2021-09-01 05:46:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 46dfed6b21a3ae44fea46aa21620fac6 SHA-1: 501458097a8d713a1b52cf94c1a6978179b5a14a SHA-256: 2e5abd629d82233b6e95b04a89e80bfda77a0291c7d155cda62982115219bd45
156 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate the document functions as a link farm, directing users to multiple compromised or disposable hosting sites. The embedded URLs and the PDF structure strongly suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 https://giorgiosantinelli.it/file/gikazew.pdf In PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d763313d275---kedabifelojigapewikow.pdfIn PDF document text
    • https://anthonygillant.com/userfiles/file/76558035875.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/1607ba43c8ae4e---71925595143.pdfIn PDF document text
    • http://sparkpro.lv/content/file/69741743689.pdfIn PDF document text
    • https://surupaceanu.ro/ckfinder/userfiles/files/fixogoxuwawuxini.pdfIn PDF document text
    • http://fandimnarodaku.cz/upload/file/9687350787.pdfIn PDF document text
    • http://nature-revive.org/files/file/12378608773.pdfIn PDF document text
    • http://asustainable.com/global/file/sivapugewetarubugav.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/cf9771830811da121398b863c908bd7b/45282267578.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160928851aee3b---nisokulesulezo.pdfIn PDF document text
    • https://soosekszer.hu/upload/files/21932069979.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b265731f374---kufoxepizulogozijoluragam.pdfIn PDF document text
    • http://lncxjzxxw.com/upload_fck/file/2021-5-16/20210516114611813074.pdfIn PDF document text
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083dfbfdfad0---zatanus.pdfIn PDF document text
    • http://scamps.biz/userfiles/file/pususep.pdfIn PDF document text
    • https://cmetrix.net/ckfinder/userfiles/files/79924977890.pdfIn PDF document text
    • http://veterinariogiardinelli.it/userfiles/files/40377119732.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e3733163840---38842748428.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a65f8aba40c---75390722368.pdfIn PDF document text
    • http://zonwering-belgie.eu/ckfinder/userfiles/files/vagokabezefavi.pdfIn PDF document text
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/c9o9seo7rn2rhn1ir2gltdg1bj/polokexuwepamutupilagowub.pdfIn PDF document text
    • https://portugaliaimagyarok.com/ckfinder/userfiles/files/3552900729.pdfIn PDF document text
    • http://busankid.com/webfiles/board/file///puxuwevemofodasopaf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=letra+tipo+letteringPDF 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_off0000c3f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3F4 10216 bytes
SHA-256: 6e63625949424eb036dd897508f6af1bcc585a69bef029aca0a3a0de4dd4f486
font_01_sfnt_off0000dae9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAE9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f2fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2FB 15708 bytes
SHA-256: 327b5a883cce158a1890d793ae163752e1ab9d569e4e9c70fdd8f0b2d2d540ee

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