Malicious PDF — malware analysis report

Static analysis result for SHA-256 1301c4f3af340086…

MALICIOUS

PDF

69.2 KB Created: 2021-03-16 19:03:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 97d5e348d653967d41196a05528a30f0 SHA-1: 7176a445be92b00edafdc1dbaa69616a0730732e SHA-256: 1301c4f3af340086c9686fea3a1d7df1ef8d510be078169f7fcc6a7b1d9cf5e9
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jumiwimov.ru/wix?keyword=gram+mole+practice+problems+answers PDF link annotation
    • http://dawezedelofeda.scienceontheweb.net/tefulejekenulonelaroboma.pdfIn PDF document text
    • http://togezapavux.iblogger.org/dezibebamasatiwodivezaxar.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bexukavibume.myartsonline.com/gugoxiwikamigezu.pdfIn PDF document text
    • http://vunonam.atwebpages.com/zesadodenujuvowosolate.pdfIn PDF document text
    • https://a1c9bafd-2917-4c1b-b79c-a4b44a941470.filesusr.com/ugd/f0f215_03b8dcc9689942fcaf85d0a3555763dd.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b53a7146-1b07-4387-9b0d-b34ab25f0801/17572631610.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14051d87-334e-4da0-8221-83773e5394ef/hp_color_laserjet_cp1215_printer_price_in_india.pdfIn PDF document text
    • http://vigavanoxe.onlinewebshop.net/50550659861.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4cf1fde-3f72-41fd-a109-73dae6f6c7a6/olds_maternal_newborn_nursing_9th_edition.pdfIn PDF document text
    • http://tedupogepovajeb.epizy.com/openpilot_cc3d_flight_controller_software.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c2229a7-825f-4cfa-bec1-c96b55f90518/72744443758.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ba3daac-a02d-4fc5-b0a3-91a45e1ac65b/is_vicks_waterless_vaporizer_safe_for_babies.pdfIn PDF document text
    • https://52a72965-a6d2-471e-b66a-59a59a4d663b.filesusr.com/ugd/e643da_827d2042046d4366b91b799647d9a665.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/103be29f-4b4b-4eda-91e3-399ddd6eb983/41380758831.pdfIn PDF document text
    • http://kivozusemu.atwebpages.com/guvaxetusovubanidenuke.pdfIn PDF document text
    • http://jabukejezari.epizy.com/bezutalazegigalesipuzeke.pdfIn PDF document text
    • http://tavuvije.epizy.com/96427393007.pdfIn PDF document text
    • http://liwobeve.rf.gd/html_to_jquery_free.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cfee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFEE 5340 bytes
SHA-256: 6c5b7305600e4d784714289a0be91698a3441b760835d1e01f53f182f23f2fd0
font_01_sfnt_off0000e20a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE20A 10532 bytes
SHA-256: 07792e940130101f894d7996607b03023a3172e6abf9987a2e89358e59c859d8

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