Malicious PDF — malware analysis report

Static analysis result for SHA-256 daa508d8f879552c…

MALICIOUS

PDF

84.4 KB Created: 2021-03-31 17:02:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 1b0e92e38ca33a37d13e9f87816b5514 SHA-1: 2b59e2567d31e150caded1e84b6249c133c08810 SHA-256: daa508d8f879552c8d353b5432a3820ec5233101e9d2ae7386f4fae99426b37e
144 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of an SEO redirector URL, specifically 'https://leonvi.ru/strik?utm_term=gimp+os+x+10.6+8', suggests a phishing lure designed to trick users into downloading potentially harmful software. The document body, though heavily obfuscated, contains text related to 'Gimp os x 10.6 8', likely a pretext for the download lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://leonvi.ru/strik?utm_term=gimp+os+x+10.6+8 PDF link annotation
    • https://cdn.sqhk.co/zezerixuwab/LibghQM/space_rangers_2_reboot_download.pdfIn PDF document text
    • https://cdn.sqhk.co/xiwasazafu/cbiezqM/best_old_hard_rock_songs.pdfIn PDF document text
    • http://itali-big.space/volkswagen_service_center_navi_mumbai5oqfg.pdfIn PDF document text
    • https://cdn.sqhk.co/terodekijur/ceYMsih/diwamolari.pdfIn PDF document text
    • http://bovakepixoworax.iblogger.org/domestic_abuse_workbook.pdfIn PDF document text
    • http://boost-shop.xyz/22_clues_level_34_study_of_fungif9bm6.pdfIn PDF document text
    • http://jelebojibujij.iblogger.org/epson_workforce_600_ink.pdfIn PDF document text
    • http://sofebitaxed.iblogger.org/70066600033.pdfIn PDF document text
    • http://taxiditugivubed.iblogger.org/25939862655.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zarevizebi/i_ll_be_back_public_information_film.pdfIn PDF document text
    • http://vagaloxesawazo.rf.gd/legend_of_zelda_zeldas_lullaby_flute_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/zinudipir/lifetime_52_portable_basketball_system_canada.pdfIn PDF document text
    • https://s3.amazonaws.com/kevava/chemistry_notes_for_bsc_3rd_year.pdfIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/is_microsoft_data_science_certificate_worth_it.pdfIn PDF document text
    • http://xatuwazelatokow.rf.gd/fefutonosileronafimapur.pdfIn PDF document text
    • http://fapujeg.epizy.com/buying_a_business_checklist_qld.pdfIn PDF document text
    • https://s3.amazonaws.com/vojapu/milowesupixugurolaxut.pdfIn PDF document text
    • http://kesekerezox.epizy.com/aphasie_transcorticale_sensorielle.pdfIn PDF document text
    • http://sisigetevi.rf.gd/rakokexutowilafuzamabov.pdfIn PDF document text
    • http://totoxosogazu.rf.gd/balboa_park_san_diego_map.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_off00010d87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D87 5300 bytes
SHA-256: b588b927808a6c12a783f8e13396927d1cee30d1860e6e5e260ad2b40db8591b
font_01_sfnt_off00011f98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F98 10868 bytes
SHA-256: 6a1fa228d4925e94a95fabc95ccddc7f03625d43bffaf4fd5d374e1369b38884

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