Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ab87d2bf9e3aa76…

MALICIOUS

PDF

83.5 KB Created: 2021-04-09 01:20:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: d8525010dc4978a54eb8cb13985a9d71 SHA-1: 78fa14538b76c4d49295765c1b572ad680225a13 SHA-256: 8ab87d2bf9e3aa76c37483e6ec36264c69a294268ec51128315cd3f3b97824ba
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one prominent URL leading to a suspicious domain. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery. The document body, though heavily obfuscated, appears to be a lure related to a movie search term, designed to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://pelibifir.ru/strik?utm_term=the+good+girl+movie+2017 PDF link annotation
    • http://jolamuvinuma.iblogger.org/exercicios_de_numeros_em_ingles.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/xipavir/corporate_promo_video_template.pdfIn PDF document text
    • https://ec679cc6-872a-45a8-b2fd-b1bc8f6ddb77.filesusr.com/ugd/d1d005_f17c443c4124484ba0adbcdd56349162.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mubefula/ssc_stenographer_book_in_english.pdfIn PDF document text
    • https://3c8197b3-f999-4f29-b3da-fbdfea3dbf34.filesusr.com/ugd/0047a4_9a8cb7d28a4b4aa49ecc4de63eb99b51.pdf?index=trueIn PDF document text
    • https://2a082fd4-e93f-4b8e-9e59-408fa046b31c.filesusr.com/ugd/e334dd_21e6353a0ec04d119cb890e65e04fc1d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wivunonovef/28913252581.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/ms_shining_movie_song.pdfIn PDF document text
    • https://s3.amazonaws.com/mozedijiz/diamond_plate_stainless_steel_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/filidabut/6737403192.pdfIn PDF document text
    • https://35548484-ce42-4b18-9d9d-834326683263.filesusr.com/ugd/a221b6_f5ab4c5867db45a28dd96808e6dc80ec.pdf?index=trueIn PDF document text
    • http://zafipuzekamezu.epizy.com/49652104871.pdfIn PDF document text
    • https://e3e1c2aa-7f41-47b0-8c2f-d823cb48b857.filesusr.com/ugd/7598fa_429784f0a0f844059467f5ab6116e016.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sazixipame/staff_attendance_warning_letter_template.pdfIn PDF document text
    • https://s3.amazonaws.com/fuzafuzeruwit/hunter_x_hunter_hisoka_wallpaper_free.pdfIn PDF document text
    • https://s3.amazonaws.com/difigomisosak/does_using_a_waterpik_help_whiten_teeth.pdfIn PDF document text
    • https://b73b9701-b1df-43be-b031-73419f87697c.filesusr.com/ugd/bfbd96_ee1815ab7ba1439da4f92ac0f769708a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gazivemon/the_beeches_primary_school_ofsted_report.pdfIn PDF document text
    • https://1628ddcf-e301-416d-9649-d9339b85441b.filesusr.com/ugd/0b1079_ea04ab390f02412d84c8eabcedbbf9ab.pdf?index=trueIn PDF document text
    • https://01c4c9a3-ee74-4db9-a65d-799443b8dbf1.filesusr.com/ugd/a64c8c_fc9f16e3ad904323b6b23dab0ba16d62.pdf?index=trueIn PDF document text
    • http://xegefonupekowa.epizy.com/vexuzupudixirakatixupod.pdfIn PDF document text
    • http://wedizakur.epizy.com/85767051411.pdfIn PDF document text
    • https://s3.amazonaws.com/wefemabeni/whatever_happened_to_the_caped_crusader_amazon.pdfIn PDF document text
    • https://b615eccc-4413-4b1d-8109-ede925130a83.filesusr.com/ugd/0994f9_895cc22340eb42feb8a9e7a40f741c39.pdf?index=trueIn 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_off0000fb36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB36 4868 bytes
SHA-256: b37d3206cc9e94e27ac3e1e6a83390284e9953ac257c630e57aca31e3b882b13
font_01_sfnt_off00010bcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BCC 11208 bytes
SHA-256: c7bb3b26a9abdb415e24559fbab11340bbd8ec0d623056dbdff5eb9ee3b57571
font_02_sfnt_off00013214.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13214 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176