Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d7f246c42bae173…

MALICIOUS

PDF

94.8 KB Created: 2021-06-26 16:57:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: a92c0ec7b25bd44e08802c5ead73c127 SHA-1: f33e4e301afa8ac4471619200123ee0fb7e7aef7 SHA-256: 7d7f246c42bae173c155354d134db1ca916340cc8a9605ccaff8a9469be1a65c
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to compromised websites and potentially disposable hosting, suggesting a phishing or malware distribution campaign. The PDF structure and embedded links are consistent with attempts to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://arerp.kr/data/file///sewegarasiwezepidipaxomit.pdf In PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16071d122beba4---rerodesanakotazom.pdfIn PDF document text
    • http://zap-interactive.com/uploads/files/mapuzamukenawiwafij.pdfIn PDF document text
    • http://ytlcases.com/userfiles/file/kiwupebexanaxemomepikopaj.pdfIn PDF document text
    • http://veraschwemmle.de/fckdata/file/67816207108.pdfIn PDF document text
    • http://duancanhotot.com/upload/files/lunenapuzolol.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/6fc914401a1b8eeba5b48d72302fe0c6/denemovuzujexeg.pdfIn PDF document text
    • https://pensiunea-escape.ro/ckfinder/userfiles/files/24952425687.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160b5ce59627ad---lexumodotifagavabadefa.pdfIn PDF document text
    • https://viettincapital.vn/upload/files/juwafunilibozeputon.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093cb6b3a3c6---4052326706.pdfIn PDF document text
    • https://securitegenerale.tn/userfiles/file/25907286662.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/789226d3d68e639ce0823200df5008f5/zavifujadigosusu.pdfIn PDF document text
    • https://secolink.sk/userfiles/file/87572664315.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1606f42513fc66---27037595688.pdfIn PDF document text
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d39258df79---vunipasodajovipizuxeliseg.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/5b225eb0c4dae4cd2ac1004d141246b7/perin.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/uq7vesuqi1l2dqki0u8k232hn6/marizuvozepuzeji.pdfIn PDF document text
    • http://diplomat2014.ru/ckfinder/userfiles/files/7582471207.pdfIn PDF document text
    • http://elazentrale.de/images/uploaded/file/kanufulusi.pdfIn PDF document text
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/slnul9k2eual3ci805e4td0m8b/44293015986.pdfIn PDF document text
    • http://auto-spec.ca/fck/file/44699168376.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=the+meek+will+inherit+the+landPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010944.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10944 10364 bytes
SHA-256: beab5c042727b67e27cc171eaa3514a8df5522c9803e234b8e54fffc129510ed
font_01_sfnt_off00012072.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12072 20768 bytes
SHA-256: d0b531ef515f03aea6c4bc02e770cb8a83410dfb14eb3ca375fddaeb1b388202
font_02_sfnt_off0001560e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1560E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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