Malicious PDF — malware analysis report

Static analysis result for SHA-256 bab01b2cfa3499ec…

MALICIOUS

PDF

90.6 KB Created: 2021-09-14 10:06:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: af3ab66a66d77a6182e5f3bf0366b0e4 SHA-1: df3f66a46794fcd72dc25d26eb686894202632d3 SHA-256: bab01b2cfa3499ec88edb953ae9c73a3f33dc8869c725e137d40fb37c41cc94f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to various websites, including one that purports to offer a download for 'minecraft pocket edition'. The presence of multiple URLs hosted on compromised CMS uploads and disposable hosting suggests a phishing or malware distribution scheme. No scripts were extracted, but the overall structure and URL targets point towards a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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://infrive.ru/uplcv?utm_term=minecraft+pocket+edition+download+in+pc PDF link annotation
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/16134c7e226c75---19826964833.pdfIn PDF document text
    • http://srcchaika.ru/files/uploads/files/68604245656.pdfIn PDF document text
    • http://www.novosib-sport.ru/ckfinder/userfiles/files/6946115015.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b20430cc04---79740948351.pdfIn PDF document text
    • https://kingcom.edesign.fr/gr33/web/uploads/assets/file/dajanawituk.pdfIn PDF document text
    • https://floridainvestment.cz/files/file/67178041835.pdfIn PDF document text
    • http://vom-ragnaroek.de/uploads/file/74073134797.pdfIn PDF document text
    • http://4bzsoftware.com/Images_upload/files/60839921906.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1612fe44fb4880---33791796624.pdfIn PDF document text
    • https://pikhospital.com/ck_uploads/uploads/files/gasujalivolumul.pdfIn PDF document text
    • https://xn--80aggmy8c6c.net/UserFiles/File/batunelitudewotot.pdfIn PDF document text
    • http://hamdannepal.com/userfiles/file/71660785984.pdfIn PDF document text
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/7ft8u3k85o2f1auhk5f2jqifk4/82110123401.pdfIn PDF document text
    • http://dientrotiendathc.com/media/ftp/file/9985969403.pdfIn PDF document text
    • https://ddmmaze.altruistictech.org/documents/img/upload/files/lomesobubopuworeju.pdfIn PDF document text
    • http://phulieumaymacbaoco.com/hinhanh_fckeditor/file/lokajapu.pdfIn PDF document text
    • http://fmmvn.net/userfiles/files/luxep.pdfIn PDF document text
    • http://hgbs.de/userfiles/file/50285268222.pdfIn PDF document text
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fc1d20778c---puvotur.pdfIn PDF document text
    • http://rootbeadmill.com/upload_fck/file/2021-9-3/20210903205626997996.pdfIn PDF document text
    • https://himalayanthailand.com/image/upload/File/nisewul.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/0c88f3a9cdbe35ccb5c01cd77ea87fb3/getifo.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_off0000f268.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF268 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010a7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A7A 22136 bytes
SHA-256: 343b5829ab2a824d572fc5c509602afb221a949f6a7bfcab764fe59d1180417a
font_02_sfnt_off00014431.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14431 10616 bytes
SHA-256: dd92a860161eca2653031b9447ff208bfc595f0a8955c9b8e8c04e9ab541fe03

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