Malicious PDF — malware analysis report

Static analysis result for SHA-256 f32646e7032abaa8…

MALICIOUS

PDF

84.1 KB Created: 2021-02-22 03:54:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: ea8f1215b08d7c51b55c405bb0b34f91 SHA-1: 837477abc3708918a4f4481fe93d6c5042ce6484 SHA-256: f32646e7032abaa84f70ce2d93d1c183a668f3769f016d8845c50eeae39ee086
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, indicating a link farm designed to redirect users to potentially malicious websites. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a common tactic of using documents as a lure to external resources.

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
  • 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.
  • 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://maypoin.ru/wix?keyword=the+devil%2527s+notebook+pdf+espa%25C3%25B1ol PDF link annotation
    • https://cdn.sqhk.co/zikegasenar/DixjdRJ/withings_scale_fitbit.pdfIn PDF document text
    • http://yoptan.space/ralizegary9bik.pdfIn PDF document text
    • http://boomerangoo.site/3.3_proving_lines_parallel_worksheet_answers63ft3.pdfIn PDF document text
    • https://pagafamowadaf.weebly.com/uploads/1/3/4/8/134878907/somuredidusekogusat.pdfIn PDF document text
    • http://madewithsunshine.com/gesisiwt45zs.pdfIn PDF document text
    • https://cdn.sqhk.co/gaxozamikoge/fRm6KnS/somuwijunomujusevoja.pdfIn PDF document text
    • https://sugodaxekot.weebly.com/uploads/1/3/1/8/131872070/kipotogi_jilibetum_lixow.pdfIn PDF document text
    • http://jumbochecker.com/130655637934acjo.pdfIn PDF document text
    • https://cdn.sqhk.co/lamajemomu/jcibgiI/frontal_gaming_shop_diamond_ff.pdfIn PDF document text
    • https://moturepuka.weebly.com/uploads/1/3/1/8/131871952/3a19e0.pdfIn PDF document text
    • https://cdn.sqhk.co/botajedelej/dA36L4F/toca_kitchen_2_free_download_ipad.pdfIn PDF document text
    • https://cdn.sqhk.co/jifigetuxu/zgd2hcF/4_pics_1_word_answers_6_letters_flower.pdfIn PDF document text
    • https://cdn.sqhk.co/xafiguzi/WieRkic/tips_fall_guys_ultimate_knockout_gameplay_espanol.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/lurutopobi/andrew_wommack_bible_study_notes.pdfIn PDF document text
    • http://tagugatukosag.epizy.com/hack_wifi_without_root_apk.pdfIn PDF document text
    • http://mumupaju.epizy.com/40719130087.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_off0000fd48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD48 5280 bytes
SHA-256: 61397e341999d3980079283d19c39e89e7e8e039092f826b10c55f529324e85d
font_01_sfnt_off00010ef8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EF8 10616 bytes
SHA-256: 1ad380a04b20c66c3f696d298ea020ae9fe74eab48d105a2e6eb8749d677fccd
font_02_sfnt_off000132e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132E5 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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