Malicious PDF — malware analysis report

Static analysis result for SHA-256 0302ff77a4b14ef3…

MALICIOUS

PDF

93.1 KB Created: 2021-08-10 00:04:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 72756eb98338532542e5b3d81489ccdd SHA-1: 09e6e29ef1673423edc1c2547e9c1a83280e9a67 SHA-256: 0302ff77a4b14ef3af073560b5f6d8472860c8665a3a6b0301be4ddc26fd55a8
156 Risk Score

Malware Insights

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

The PDF contains numerous links to compromised websites, indicating it functions as a link farm. The presence of multiple distinct hosts and the use of UTM parameters suggest an attempt to lure users to potentially malicious content. ClamAV detection and ML classification further support its malicious nature, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://smidgel.ru/uplcv?utm_term=verbos+irregulares+en+ingles+presente+pasado+futuro+y+participio PDF link annotation
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160bb783aa52b3---27255889942.pdfIn PDF document text
    • http://www.astmalek.cz/obrazky/file/zogevanarebo.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/1c39ce9ecf9f5d5849754bfff71fc23a/6628776826.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160a4dea7f382b---73935376026.pdfIn PDF document text
    • http://boxerdapolenta.com/cmsimple/images/file/18685148980.pdfIn PDF document text
    • http://maasmartcity.com/userfiles/file/38028258353.pdfIn PDF document text
    • https://www.nosolodespedidas.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608101ff07973---96991733850.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/095a2a272d8815d530671a8d0f09bfbf/kewozatixut.pdfIn PDF document text
    • http://fygl.net/uploads/file/110943469137.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160bfa6f703153---pilozakakok.pdfIn PDF document text
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/1hg182p0jaml43re26sjvm0b9q/639934305.pdfIn PDF document text
    • http://precedent.by/_newsite/images_from_html_editor/file/fexosagupadezaneju.pdfIn PDF document text
    • https://rockyshairsalon.com/wp-content/plugins/super-forms/uploads/php/files/4r6ajo6bal18a71slljrb46quj/vejumavo.pdfIn PDF document text
    • http://dnepropress.net/files/file/17557757284.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099dac11b5bf---mepodizifamutubelalogi.pdfIn PDF document text
    • http://maslag.eu/userfiles/file/bofizuz.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b5dd3543c26---49854136763.pdfIn PDF document text
    • https://xlspandoek.nl/userfiles/file/36752791174.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b5a4f151421---56376901455.pdfIn PDF document text
    • http://standdominica.org/files/files/wujixuzegigajofutuku.pdfIn PDF document text
    • https://schilderlesvakantie.nl/ckfinder/userfiles/files/89109177069.pdfIn PDF document text
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/2ace9a53fc24a5dd6fd3acd6c104e645/69546488103.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/10994ff9967597dcc4091d6c85c86835/13403756819.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_off00010377.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10377 11120 bytes
SHA-256: 9d959492af2c5852a284d5e1bbff9644379a87112119f8ecbd19b966648eb2bb
font_01_sfnt_off00011d29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D29 18340 bytes
SHA-256: f320c4ce87ad28fbd4dba3782ca7b95d5cbc75b723e587bf9b16649294a9f8ab
font_02_sfnt_off00014b6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B6D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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