Malicious PDF — malware analysis report

Static analysis result for SHA-256 11a8ace2acecede7…

MALICIOUS

PDF

72.6 KB Created: 2021-03-04 01:56:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 5f6eead3bdd5156833526d30915a8381 SHA-1: 9cbf357ef3e5ae8284c2371866074a815a285a83 SHA-256: 11a8ace2acecede7073b3bd6a8a822a90940638f129ff9ca7fe5ef643e29df27
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • 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.
  • 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://xezojetit.ru/award?keyword=best+dual+sensor+battery+smoke+detector PDF link annotation
    • http://faceit.su/the_girl_in_the_flammable_skirt8z0qu.pdfIn PDF document text
    • https://bovikobugekut.weebly.com/uploads/1/3/0/7/130775803/8264364.pdfIn PDF document text
    • http://remontvorot24.com/crafting_guide_mod_minetestwk099.pdfIn PDF document text
    • https://xekozetona.weebly.com/uploads/1/3/4/5/134508060/dopukeve.pdfIn PDF document text
    • http://probmake12.xyz/signals_systems_and_transforms_5th_e6tr0u.pdfIn PDF document text
    • http://zomaragexavope.sportsontheweb.net/83112956699.pdfIn PDF document text
    • http://polnews.xyz/ejercicios_de_trigonometria_1_bachillerato_resueltosqayjz.pdfIn PDF document text
    • http://rowowevu.mypressonline.com/20955445416.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/napisakaluja/nokixiwogotevodovod.pdfIn PDF document text
    • https://s3.amazonaws.com/wurivuve/candy_crush_online_without.pdfIn PDF document text
    • https://s3.amazonaws.com/marimejerebo/ous_suffix_words_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/fefurorobumi/95581932698.pdfIn PDF document text
    • https://s3.amazonaws.com/benubapopikaj/46045596548.pdfIn PDF document text
    • https://s3.amazonaws.com/fulazelof/angry_birds_game_apkpure.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_off0000e080.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE080 5440 bytes
SHA-256: a38491cc96304e652639dc1aaa98d44f41fe4f938fe7166c715376f1ae03a108
font_01_sfnt_off0000f2f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F6 10200 bytes
SHA-256: 668552d24205b9462cae73acba923349518314707dbf7907a9dd4dd89fa4f1f8