Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa85835b85543f40…

MALICIOUS

PDF

73.4 KB Created: 2021-02-25 13:50:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 3c38f0d69c7a38051cbb8f4f0ce201d6 SHA-1: 8af3dd76c698d69717394bba14294899e28f8719 SHA-256: aa85835b85543f40ce53c6c21409f2014f970fb03e6fc2869f21670af9ed6285
254 Risk Score

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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.
  • 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://yafferge.ru/wb?keyword=who%20is%20marla%20maples In PDF document text
    • https://jikabokuw.weebly.com/uploads/1/3/4/6/134658058/tegodirixa_junolovadozunaz.pdfIn PDF document text
    • http://safijejog.mygamesonline.org/68190021722.pdfIn PDF document text
    • http://desokore.medianewsonline.com/will_there_be_a_series_2_of_alex_rider.pdfIn PDF document text
    • https://cdn.sqhk.co/pamezuravuno/jgfjc04/dragon_pass_app_natwest.pdfIn PDF document text
    • https://dugaposiga.weebly.com/uploads/1/3/4/8/134857723/96592.pdfIn PDF document text
    • https://cdn.sqhk.co/pujixefan/jueehdD/nodogenezisodijik.pdfIn PDF document text
    • http://zagesevava.iblogger.org/free_worksheets_finding_least_common_denominator.pdfIn PDF document text
    • https://cdn.sqhk.co/dorejewibiz/YjeAhaH/takamijekujibiwupanebef.pdfIn PDF document text
    • https://kobuzefejara.weebly.com/uploads/1/3/1/4/131437799/kefelojogunijalefefi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zexizel.epizy.com/palabras_agudas_llanas_o_graves_esdrjulas_y_sobreesdrjulas.pdfIn PDF document text
    • https://s3.amazonaws.com/lupuvogotog/93912254559.pdfIn PDF document text
    • https://s3.amazonaws.com/tutasujal/bomberman_world_ps1.pdfIn PDF document text
    • https://s3.amazonaws.com/minegikukovel/baby_announcement_email_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wuxupewu/sime_darby_plantation_berhad_annual_report_2017.pdfIn PDF document text
    • http://namakanexir.atwebpages.com/is_vitamix_really_worth_it.pdfIn PDF document text
    • https://s3.amazonaws.com/sixenogafopoj/wakufawa.pdfIn PDF document text
    • http://vivazuriperulus.epizy.com/wapking_new_marathi_song.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_off0000e337.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE337 5072 bytes
SHA-256: e4f4a98997725e8f2352d3b3bc79251058b1fd2554ae775440ff672dbf2eaaa8
font_01_sfnt_off0000f452.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF452 10780 bytes
SHA-256: 3f753c3057c4e6d859cbb84ca5394638e3358b96f4e319d7a43ea9a93131adc8

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