Malicious PDF — malware analysis report

Static analysis result for SHA-256 758582cee478c2eb…

MALICIOUS

PDF

72.5 KB Created: 2021-02-23 09:08:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 9fe678b0be1595f3c6619bf2cddca526 SHA-1: de02af7abf9ba21e12196f3601596d7ac2538024 SHA-256: 758582cee478c2eba322f6eeb83c96088be58bd04811406bdb881c3daa761bc0
184 Risk Score

Malware Insights

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

The PDF contains numerous external links, including a link farm identified by the PDF_SEO_LINK_FARM heuristic, suggesting an attempt to redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were extracted, the presence of embedded URLs and the overall structure point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://jottigo.ru/strik?utm_term=how+to+eject+disc+xbox+360 PDF link annotation
    • http://hydraruzxpnew4af.exchange/new_york_times_crossword_puzzles_answersei7b9.pdfIn PDF document text
    • https://cdn.sqhk.co/pananumujo/gcheggd/my_verizon_account_information.pdfIn PDF document text
    • https://cdn.sqhk.co/megilujij/ahhRbAX/24603314258.pdfIn PDF document text
    • http://classicalnaturally.com/80177543725opj3p.pdfIn PDF document text
    • https://kirebokiva.weebly.com/uploads/1/3/4/6/134634247/pololimu.pdfIn PDF document text
    • http://subfamjtii.site/who_is_the_killer_episode_iiijs5bt.pdfIn PDF document text
    • https://cdn.sqhk.co/genopeno/hghbBhi/11583936015.pdfIn PDF document text
    • http://urolog.xyz/92634111427qg63c.pdfIn PDF document text
    • https://cdn.sqhk.co/limizolaxa/g95the4/35824429212.pdfIn PDF document text
    • https://cdn.sqhk.co/xiteduva/ii6hjlD/the_pyramids_of_egypt_ies_edwards.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/kiguteperilodu/jai_ho_tumhari_bajrangbali_video.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/alternity_core_rulebook.pdfIn PDF document text
    • https://s3.amazonaws.com/juduk/10312370127.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/bumper_offer_telugu_movie_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/how_to_get_lean_body_muscle.pdfIn PDF document text
    • https://s3.amazonaws.com/mamukawaxatali/51817862965.pdfIn PDF document text
    • https://s3.amazonaws.com/wobuzisibal/adobe_audition_cs6_full_crack_fshare.pdfIn PDF document text
    • https://s3.amazonaws.com/buxoparadazegu/moment_js_format_cheat_sheet.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_off0000d102.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD102 5072 bytes
SHA-256: e98f7a8a852950cc8f4029053a77b6a98883e920907ca99b26eb101d8eecd7ed
font_01_sfnt_off0000e260.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE260 10732 bytes
SHA-256: 49c4bea432004ee288fefeceef74789ef83cb2c21303e5522c27530904256338
font_02_sfnt_off000106da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106DA 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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