Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bebc41822d4f08a…

MALICIOUS

PDF

76.2 KB Created: 2021-03-22 00:32:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 683bf78dfc991c8e128cbd0460acba43 SHA-1: 33c28111166d3b4b7c76c0bfac1ef5c75a78461b SHA-256: 2bebc41822d4f08aafbdee7b2f3e849c34f23ee5c05e03aa94d70794b92b5501
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious and potentially phishing-related. It contains a large number of external links, many of which point to suspicious domains, suggesting a link farm or distribution mechanism. The document body, though heavily corrupted, contains text related to 'bls pdf 2020 español' and the authoring application 'wkhtmltopdf', indicating a lure to disguise malicious content. No scripts were extracted, but the presence of numerous external links strongly suggests the PDF is designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://golowaki.ru/award?keyword=bls+pdf+2020+espa%25C3%25B1ol PDF link annotation
    • http://rubeatyshop.xyz/shell_programming_tutorial_point9sc45.pdfIn PDF document text
    • https://dexanobibe.weebly.com/uploads/1/3/5/2/135299911/nediboniwajonev_teluto.pdfIn PDF document text
    • https://bezaxopev.weebly.com/uploads/1/3/0/7/130740011/wezotufutegi.pdfIn PDF document text
    • https://jetebudatupa.weebly.com/uploads/1/3/4/7/134748577/243862.pdfIn PDF document text
    • http://dostafood.xyz/nufiwuvavosope3385t.pdfIn PDF document text
    • https://sanakifagijegu.weebly.com/uploads/1/3/4/4/134404207/117763.pdfIn PDF document text
    • https://zezazuzomej.weebly.com/uploads/1/3/1/0/131070861/kolak_batozuwisamige_xibofeneru.pdfIn PDF document text
    • http://reduslim-italiaufficiale.site/59316443452lxcfm.pdfIn PDF document text
    • https://mimudokax.weebly.com/uploads/1/3/4/7/134742140/rotefamilepisogeto.pdfIn PDF document text
    • http://logorag.22web.org/celeriac_nutritional_information_uk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://33da92c3-26de-4f6b-bf12-1693cb6a6e79.filesusr.com/ugd/0307f2_13c977596c5d42c09ef8687cd84d6ef2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/besafefaf/how_to_open_graco_stroller_pa-24833.pdfIn PDF document text
    • https://s3.amazonaws.com/zamuriza/menozefawodijubidexut.pdfIn PDF document text
    • http://vamagirizotaro.rf.gd/7410191648.pdfIn PDF document text
    • https://a4346b84-4611-49ab-b113-80c9188ca613.filesusr.com/ugd/078c79_c425b4b57f4748608027a1b1a1b3b344.pdf?index=trueIn PDF document text
    • https://6ba7316d-b84b-4ccb-a32a-103c856d4013.filesusr.com/ugd/91f37e_eeebfbdb8c0f4739b27020780288d7c8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/veraxawewib/differential_and_integral_calculus.pdfIn PDF document text
    • https://s3.amazonaws.com/guvovigo/speakychat_apk_indir.pdfIn PDF document text
    • http://fakadigat.epizy.com/asus_m5a97_le_r2_0_bios_update.pdfIn PDF document text
    • https://s3.amazonaws.com/xebuvuwov/family_and_friends_6_grammar_answer_key.pdfIn PDF document text
    • https://3b0fe5ff-7f86-489c-8138-fc984e51136c.filesusr.com/ugd/bfd78a_fac6e86c847b426286667e44f7e2fb1a.pdf?index=trueIn PDF document text
    • https://8eefcaf3-52f5-4123-8be5-b1f0aaeea45e.filesusr.com/ugd/1d3654_8d73298fb7ef48299100b7dcb837b52b.pdf?index=trueIn PDF document text
    • http://gabinosemepof.epizy.com/23964245762.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_off0000ea28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA28 5472 bytes
SHA-256: 46ad4f9fc4fa5650853e24bc6f4a4206bb180b4fd83cff1ee58a30e6c60f9131
font_01_sfnt_off0000fc9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC9E 11652 bytes
SHA-256: b7a64b2fd66bf3db948e1750cef2e2d719c68add39a3d8c67d353feccafd58b9

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