Malicious PDF — malware analysis report

Static analysis result for SHA-256 659fdf93bbceb913…

MALICIOUS

PDF

83.7 KB Created: 2021-05-12 15:45:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 3ada34dea33b6effb15a7f6f5daa95e5 SHA-1: 1667be3f37473bddc80d5da6f61905ca8b268d40 SHA-256: 659fdf93bbceb913ff2cfdbd632065f58040dfaa526db9c88c3ca871bda57def
156 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 0.9996

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://dugedepap.ru/strik?utm_term=safety+glasses+case+amazon PDF link annotation
    • http://newsportstechnology.ru/the_beths_band_t_shirthtfot.pdfIn PDF document text
    • https://betutinixe.weebly.com/uploads/1/3/4/4/134481053/xikosivovuwojopefoz.pdfIn PDF document text
    • http://torchqbfl.fun/99224161891js38a.pdfIn PDF document text
    • http://nanolenka.xyz/statistics_and_probability_questions_and_solutionss10c4.pdfIn PDF document text
    • https://bebemabuvi.weebly.com/uploads/1/3/1/4/131453051/vewuwobosikazit.pdfIn PDF document text
    • https://towotadop.weebly.com/uploads/1/3/2/6/132682697/c8b4099.pdfIn PDF document text
    • http://ukranews.icu/refukuvisqp0et.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/a11a3e3f-43ed-4dc3-ad0f-ad99c328b976/nasug.pdfIn PDF document text
    • http://favukimasinete.rf.gd/avs_video_converter_full_version_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2ae188f-fe68-4ade-a34a-210c59d57d6c/how_to_remove_pimple_spots_overnight.pdfIn PDF document text
    • https://s3.amazonaws.com/polexebuj/gomaxosudalagemevazamanon.pdfIn PDF document text
    • https://s3.amazonaws.com/rimejiguvif/79138619448.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60a75442-97e3-4996-898d-b73a49592373/after_3_anna_todd_online_free.pdfIn PDF document text
    • https://s3.amazonaws.com/dazovosugev/android_games_like_gta_san_andreas.pdfIn PDF document text
    • http://wotixoweg.rf.gd/57416875659.pdfIn PDF document text
    • https://s3.amazonaws.com/nakuzafol/zororavivamegazolede.pdfIn PDF document text
    • http://jawolaguf.rf.gd/le_journal_ennahar_d_aujourd_hui.pdfIn PDF document text
    • https://s3.amazonaws.com/pewibim/74496898346.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4eeec3ca-c65a-4b90-8e88-f916dca5030e/refenesovi.pdfIn PDF document text
    • https://s3.amazonaws.com/zarevizebi/19831028850.pdfIn PDF document text
    • https://s3.amazonaws.com/dukavunivifa/ccs_c_compiler_v4_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB53 5100 bytes
SHA-256: 02a97972f16a4c3b73ceaaff772bfb7b904f9f485e396897b774282996b1f622
font_01_sfnt_off00010cb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CB0 10972 bytes
SHA-256: b6b24901b47e456e2c4961e566ebec1253c2caeec5e12c325caa72100e35b9e9
font_02_sfnt_off000131e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131E9 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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