Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfceaa2cbc970b31…

MALICIOUS

PDF

92.3 KB Created: 2021-03-13 15:02:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 9390fd989d2367327465ff990ea62053 SHA-1: 7db7419e5538f08bcddfbc40b3aa66c86f787cb7 SHA-256: dfceaa2cbc970b31e8ec2a01d2402b4fa4014f242d40ddd5eb9ef0810f2b0669
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are typical of phishing lures designed to redirect users to malicious sites.

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 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://bologen.ru/strik?utm_term=tipos+de+grupos+psicologia+social+pdf PDF link annotation
    • https://filafibiwi.weebly.com/uploads/1/3/4/3/134316544/9a103a38b41d.pdfIn PDF document text
    • http://50offshop.info/is_schwinn_ic4_same_as_bowflex_c6q7mnc.pdfIn PDF document text
    • http://tajumizigareni.iblogger.org/autodesk_autocad_3d_tutorial.pdfIn PDF document text
    • https://lewedizo.weebly.com/uploads/1/3/4/6/134610291/cdddb99.pdfIn PDF document text
    • http://persequenteamsohbet.com/modified_overt_aggression_scale9wnat.pdfIn PDF document text
    • http://ujjjrrrrr.space/all_of_dance_dj_songngwwc.pdfIn PDF document text
    • http://nisaledax.iblogger.org/autodesk_revit_mep_book.pdfIn PDF document text
    • http://siankaanmexico.com/classification_of_matter_by_composition_worksheetryno5.pdfIn PDF document text
    • http://negimemexib.iblogger.org/30050537618.pdfIn PDF document text
    • http://xegazinijitup.mywebcommunity.org/2015_amc_10b_cutoff.pdfIn PDF document text
    • http://winopufivugum.22web.org/givudu.pdfIn PDF document text
    • http://rbqjkwklnd.xyz/99975553978x1u8h.pdfIn PDF document text
    • https://bivedaniliged.weebly.com/uploads/1/3/4/7/134732971/nazowuje.pdfIn PDF document text
    • http://jovaguduretup.22web.org/bully_pc_windows_10.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://s3.amazonaws.com/jiguwuzobozobaz/wineteraledekijipesoj.pdfIn PDF document text
    • http://wurelagujenaros.epizy.com/vegep.pdfIn PDF document text
    • http://pujumek.myartsonline.com/where_are_simpson_pressure_washer_engines_made.pdfIn PDF document text
    • http://rofepezanevir.epizy.com/68601818372.pdfIn PDF document text
    • http://zoxutudirufusoj.epizy.com/ielts_academic_reading_practice_test_1.pdfIn PDF document text
    • http://wuxigukupem.epizy.com/71723431701.pdfIn PDF document text
    • https://s3.amazonaws.com/golepe/opera_browser_beta_for_android.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_off00011d47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D47 4968 bytes
SHA-256: 39ea33ab6417531dc242af4fb371afc800fb147096c16d03d925f738d9fb2c4f
font_01_sfnt_off00012e3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E3B 11584 bytes
SHA-256: 3416a80dc675ee51906cd243c1ec5f1e0368d8ac08046f85e23e5d116365fdc6
font_02_sfnt_off000153fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x153FC 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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