Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1478148936b9c43…

MALICIOUS

PDF

109.3 KB Created: 2021-03-27 20:05:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 2de47ed7f6194a43435e316e071a78e0 SHA-1: ede9e629bd49528cdadcb59fb9bec4f98d410a24 SHA-256: e1478148936b9c43a279b7f8b37b4cbcaf9412044d76af1a8657d6a1b7b3062e
164 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are to PDF files, suggesting a link farm or SEO poisoning attempt. The presence of a 'download button' heuristic and the ML classifier flagging the PDF as malicious further support this. While no scripts were explicitly extracted, the PDF structure and numerous external links indicate an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9770

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.
  • 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://seumenha.ru/123?utm_term=bcbs+georgia+provider+request+for+review+form PDF link annotation
    • https://cdn.sqhk.co/loganidob/ajtiicQ/the_chosen_book.pdfIn PDF document text
    • http://klokisik.space/bopudajuwekeribakebvkv6f.pdfIn PDF document text
    • https://rebazizezasij.weebly.com/uploads/1/3/4/5/134586802/8272743.pdfIn PDF document text
    • https://makigomeludawuk.weebly.com/uploads/1/3/4/7/134748455/vumepalafagifa.pdfIn PDF document text
    • http://momentshop.space/free_christmas_events_near_me_todayomuhs.pdfIn PDF document text
    • http://sewonmedix.ru/43772752889j568d.pdfIn PDF document text
    • https://cdn.sqhk.co/zuxeromewime/ghrjjge/monster_energy_supercross_2_game_tips_ps4.pdfIn PDF document text
    • http://tamakar.tech/samsung_tv_year_of_manufacturet4avm.pdfIn PDF document text
    • https://wuzijitegufizu.weebly.com/uploads/1/3/5/3/135320378/8627011.pdfIn PDF document text
    • https://dukifuti.weebly.com/uploads/1/3/1/4/131437117/6b1a0a65226.pdfIn PDF document text
    • https://nukevokisoget.weebly.com/uploads/1/3/2/7/132711970/be19fe740ff9.pdfIn PDF document text
    • http://astrology-personal.online/los_patitos_feoshpzwu.pdfIn PDF document text
    • https://cdn.sqhk.co/gobisofokox/jjihjEX/34681869341.pdfIn PDF document text
    • https://rovagurepuj.weebly.com/uploads/1/3/1/8/131856033/gabekitevasuvuw_kizeladuneveba_nimetadobim_doropamonur.pdfIn PDF document text
    • https://cdn.sqhk.co/surikuzezun/d7hovhh/17591527493.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/rubidokezive/36801840401.pdfIn PDF document text
    • https://s3.amazonaws.com/farowug/guragelavupu.pdfIn PDF document text
    • https://s3.amazonaws.com/lemerisinivum/e_commerce_website_templates_free_asp._net.pdfIn PDF document text
    • https://s3.amazonaws.com/gawabog/jasper_report_subreport_repeating.pdfIn PDF document text
    • https://s3.amazonaws.com/dopugaxelelema/91870211791.pdfIn PDF document text
    • https://s3.amazonaws.com/mokixetat/laduguderiwufajubixuma.pdfIn PDF document text
    • https://s3.amazonaws.com/medaliwifufugel/sedosazeroxosetenebog.pdfIn PDF document text
    • https://s3.amazonaws.com/dobikasukavu/how_to_find_angle_measures_of_a_triangle_in_a_circle.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_008_off00017dc8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x17DC8 17552 bytes
SHA-256: bb01922d5e02a10084551b920ec08926ed2e3d44ba4cd3a160bef38414add9b4
font_00_sfnt_off00010d68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D68 3984 bytes
SHA-256: 7a7cab06f4f43c777a5d2f9f30d89d64a099909a73369ea6383694947ba8ad17
font_01_sfnt_off00011bc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BC3 5908 bytes
SHA-256: a5b1c01ba60f0a9ee692028df27536e898705b23489ea28842d4a70b2434b27a
font_02_sfnt_off00012fdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FDC 4404 bytes
SHA-256: ee6d8e76d24790d2072a197d229e9122625aa272ffd5757a64ebb54c2f441753
font_03_sfnt_off00013e03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E03 6640 bytes
SHA-256: 538512be6c526ea957b587fa229624d829dca4873b622d187784a60d2c877fcd
font_04_sfnt_off00014fa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FA1 14732 bytes
SHA-256: 335e3138c0bb1dde6c098fc3079d3205438b9eb3ac0dcf573498a4da49cf8788
font_06_sfnt_off0001985a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1985A 3144 bytes
SHA-256: f83fb73d0b415b57915fc37ed960611a324fd74e68231a3e578c8d9003047d83

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