Malicious PDF — malware analysis report

Static analysis result for SHA-256 27a2e15995c4c9d6…

MALICIOUS

PDF

72.6 KB Created: 2021-09-01 08:50:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: d7a6172977c966e64c888470903c3bf4 SHA-1: 3aa90f46a8a71416b28f998243d9edf17c82929e SHA-256: 27a2e15995c4c9d6053d3a9f3ecad7a0bd532c4575fa88171b4f205e19cf2777
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains a large number of embedded URLs, many of which point to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of these links indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://garglob.ru/uplcv?utm_term=hobbs+and+shaw+film PDF link annotation
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f7b6793194---baguwosapubafesamab.pdfIn PDF document text
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088bb9ae31cf---19716594207.pdfIn PDF document text
    • http://brilspa.ro/userfiles/file///merefukutevudotezoxes.pdfIn PDF document text
    • http://evpltravel.com/xv_image/file/11335709450.pdfIn PDF document text
    • https://pecsikult.hu/files/file/serajonezalisovozuf.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/ufengr7o22fa06aq1inli4scpf/22098524243.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/d1ef97765da462293e2ad534554485fc/44935311443.pdfIn PDF document text
    • http://uat2.hkha.com.hk/ckfinder/userfiles/files/kusinifikenifijagoxewet.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/59e8005e8396b5fc30b72beb4983ebc4/48904245445.pdfIn PDF document text
    • https://iword.de/userfiles/file/86817580141.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/cc9164f2e0234139fdd1ff36353d0b24/71210530598.pdfIn PDF document text
    • http://begemot-rus.com/uploadfiles/file/2021071804562273499.pdfIn PDF document text
    • https://tedvandergulik.nl/userimages/file/97679887093.pdfIn PDF document text
    • http://studioscoponi.eu/userfiles/files/xuvajofev.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/4fmklblc50kk33619i6t6taqqp/simax.pdfIn PDF document text
    • https://kimansion.com/uploads/file/radebuposonovetiw.pdfIn PDF document text
    • https://hoakhanh.vn/uploads/image/files/kololadin.pdfIn PDF document text
    • https://singaporenotarypublic.com/wp-content/plugins/super-forms/uploads/php/files/8b4f7ef2314d6e9f429e922e55be74b0/8318204680.pdfIn PDF document text
    • http://canadanur.com/resimler/files/wolewufamevi.pdfIn PDF document text
    • http://faradbox.pl/files/file/gawudobotupino.pdfIn PDF document text
    • https://c4ir.ae/wp-content/plugins/super-forms/uploads/php/files/j48d9mji27gd6cfo32dqhcnee5/pidupofejisasirirute.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/0ffd8dc275f333e3fc8ef9afd9c39e59/gijovoxanokizinono.pdfIn PDF document text
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/3bb0f814de4277c37cb48dcb5e45d365/61435149829.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf112885f1---68970820572.pdfIn PDF document text
    • 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_off0000bc31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC31 15540 bytes
SHA-256: 64c1a8ec348de3d29ab6b9828c1c76f94a8a9e1149fd36c0ed216dae64351a76
font_01_sfnt_off0000e42d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE42D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fc44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC44 10504 bytes
SHA-256: c99b39cb52824028874e338705ebd7c2836be714b3935c21210563a0ba9672d9

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