Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8165b5f08240f35…

MALICIOUS

PDF

72.9 KB Created: 2021-02-22 13:49:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: b4b93c4033ed33222640ca486eae1b1d SHA-1: ec24bd1cbcc02de59259a9931629fe07e73713ea SHA-256: b8165b5f08240f35d5d60e8c8fa49ae848b9b2f94e343c54994629e3cd645c27
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://leonvi.ru/wix?keyword=wiley+cpa+exam+review+2016+pdf PDF link annotation
    • https://cdn.sqhk.co/dokukavifig/jdwMjiR/pixel_battle_royale_games_unblocked.pdfIn PDF document text
    • http://cocobeautybar.ca/bazel27glc.pdfIn PDF document text
    • https://musuvawe.weebly.com/uploads/1/3/4/5/134528527/8738983.pdfIn PDF document text
    • https://masiwirisiniziz.weebly.com/uploads/1/3/1/4/131453333/1d58f61f6470e00.pdfIn PDF document text
    • https://cdn.sqhk.co/lovuzegonu/Gjif4gg/limbo_nerf_warframe_2020.pdfIn PDF document text
    • https://mavuweginu.weebly.com/uploads/1/3/2/6/132681431/53006324e39.pdfIn PDF document text
    • https://cdn.sqhk.co/sikereri/fjaNiiM/bikigerudifele.pdfIn PDF document text
    • http://silvanozito.online/english_language_techniques_gcsee22y0.pdfIn PDF document text
    • http://mexicotop.xyz/vidigik2xq57.pdfIn PDF document text
    • http://study-english-02.space/freckle_math_app5788f.pdfIn PDF document text
    • https://cdn.sqhk.co/kufalavoxig/x7JVTij/hovercraft_getaway_mod_apk_1._1._4.pdfIn PDF document text
    • http://sportita.fun/jafupe3r4se.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/suxugipipolazog/zumarobovegutiwu.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaduxa/91662727477.pdfIn PDF document text
    • https://s3.amazonaws.com/juvuraguvutoxif/24_hour_format_clock_display.pdfIn PDF document text
    • https://s3.amazonaws.com/devuxuzejozam/law_of_conservation_of_matter_lab_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/tapexiw/zuxowagagu.pdfIn PDF document text
    • https://s3.amazonaws.com/debamijizozexo/ruxovigiweruzopipugo.pdfIn PDF document text
    • https://s3.amazonaws.com/desenaz/joint_affidavit_of_marriage_format.pdfIn PDF document text
    • https://s3.amazonaws.com/fukezavazuj/84227403741.pdfIn PDF document text
    • https://s3.amazonaws.com/gurupixabogivaz/the_lottery_discussion_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/mudurixo/conduct_disorder_treatment_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/zarevizebi/45229601471.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_off0000dcd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD6 5940 bytes
SHA-256: 39d941e39e9c8ed2a7cc3d00d78a95a66606844d2f728450c1a251e32e552012
font_01_sfnt_off0000f12e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF12E 10840 bytes
SHA-256: 7f41bff16c043c596fa221ddd97fed7a40018b1ba846316926e40f9b63ff6126