Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac5b94dfd0af590b…

MALICIOUS

PDF

57.6 KB Created: 2020-10-10 16:46:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: dc6613bcb609df5d5e151699ae931400 SHA-1: 59c34f3e91040cc7a111791ec5bd61d0da4d5aa7 SHA-256: ac5b94dfd0af590ba9aeb0967a5700580efda84db211cba5e89a6ff5619137c4
202 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • 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
  • 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://gettraff.ru/pify?keyword=skyrim+console+command+showracemenu In PDF document text
    • https://site-1037082.mozfiles.com/files/1037082/96884693746.pdfIn PDF document text
    • https://site-1037101.mozfiles.com/files/1037101/18996067389.pdfIn PDF document text
    • https://site-1041378.mozfiles.com/files/1041378/kijipowejow.pdfIn PDF document text
    • https://site-1042007.mozfiles.com/files/1042007/miniwekivuxinepariluzo.pdfIn PDF document text
    • https://site-1037075.mozfiles.com/files/1037075/18730689029.pdfIn PDF document text
    • https://site-1038390.mozfiles.com/files/1038390/47216986787.pdfIn PDF document text
    • http://rarumefuv.revival42.org/uploads/1/3/2/7/132740412/rufavazonure-dapovex-sosot-xarifadu.pdfIn PDF document text
    • http://files.modestousbc.org/uploads/1/3/1/4/131438056/2221469.pdfIn PDF document text
    • http://files.mogro.net/uploads/1/3/1/6/131607544/tujafatesuz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5847/0813/files/mazow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3181/2506/files/the_sims_medieval_achievement_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/6121/1047/files/jubifa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1188/9573/files/rna_and_protein_synthesis_quiz_answer_key.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a227.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA227 5540 bytes
SHA-256: 7eb716ef96da2b0e1220cf33a0825ac6ecee2c33d4a24e07181a7b24bfdbf8e2
font_01_sfnt_off0000b4d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4D6 10744 bytes
SHA-256: 4baf3c7e8987020c0f95c08ab13b588df8abb7e6f5cc5847a7fd1d6f69a6e2c5

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