Malicious PDF — malware analysis report

Static analysis result for SHA-256 17e3732dcdbdf869…

MALICIOUS

PDF

150.7 KB Created: 2021-09-02 01:22:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 72204f8487490ab17a0c2d4b8aac509b SHA-1: f7dd8e285b383003ba6f144c4953ac8f5c8bcb15 SHA-256: 17e3732dcdbdf869a272964c2decbb0612e91cbcbf685a3fc4aceadb6827360a
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of heuristics like 'SE_PASSWORD_ARCHIVE_LURE' suggests the document is designed to trick users into downloading a password-protected archive, a common tactic for evading gateway scanning. The embedded URLs, while some are marked benign, point to compromised CMS uploads and link farms, further supporting a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://www.rowtheerne.com/wp-content/plugins/super-forms/uploads/php/files/a457abafb40fa9a9fef50550650364c8/pesipeni.pdf In PDF document text
    • http://elementsgogreen.com/userfiles/file/xelifanudij.pdfIn PDF document text
    • https://avela.md/userfiles/file/zewavaledimudagipuxa.pdfIn PDF document text
    • http://thuaphatlailongthanh.com/upload/contentFile/minhchau/file/82011486622.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609c616688d3f---33409212184.pdfIn PDF document text
    • https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/dc283368f355ef488b9d058b525dcdc7/lisarogajufopidoli.pdfIn PDF document text
    • https://susta.vn/userfiles/file/jiwebasutimoja.pdfIn PDF document text
    • https://bucatariizidite.ro/printuri-fi/files/gowuzezapatabogaxu.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/c6e1a26479d2f86889cef02550f2a6c1/75566123358.pdfIn PDF document text
    • https://webmenuplus.com/images/file/79032686133.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1611e543425ba4---89343695071.pdfIn PDF document text
    • http://westmoorclassof1965.com/clients/5/52/52ec68f2b927accf75267cb07bfcc891/File/97374503119.pdfIn PDF document text
    • http://stardentalcare.org/userfiles/file/dixavigeruwulagabe.pdfIn PDF document text
    • https://ecoledesgourmets.com/userfiles/file/53607521154.pdfIn PDF document text
    • https://decoveinvestment.com/userfiles/file/kefanuxetobupenibematid.pdfIn PDF document text
    • https://an-professional.ru/img/files/file/dawiwebi.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e83dc842d39---sivotelozogevivikesavugos.pdfIn PDF document text
    • http://thuexedanang247.com/uploads/image/files/gepuxazepe.pdfIn PDF document text
    • http://rltclassof1970.com/clients/8/8f/8ff9f19c840b982a6efda18ba8bb483c/File/15954513188.pdfIn PDF document text
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c593f113d52---59014930578.pdfIn PDF document text
    • http://hnht-electromagnet.com/d/files/xubanuzevinapaf.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1608a67c921b3b---99592609684.pdfIn PDF document text
    • http://dawahcity.com/userfiles/file/769270628.pdfIn PDF document text
    • http://dribblebar.pl/userfiles/file/66366182778.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=marketing+management+case+studies+with+solutions+pdfPDF 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_off0001e71e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E71E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001ff30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FF30 19500 bytes
SHA-256: 5598c7f7b99753edf40191b3553829095c4af48e394adf60719225dc51090e39
font_02_sfnt_off000231d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x231D9 11340 bytes
SHA-256: 7678d3fbaf32db739bc972c7a0be22478a25da6c68abd0bf828db8db43ea16b3

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