Malicious PDF — malware analysis report

Static analysis result for SHA-256 d108f44eb5b5da1a…

MALICIOUS

PDF

41.2 KB Created: 2020-09-30 02:45:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 8144f528320a3944d825efb0bfd3f440 SHA-1: 7ea6fc89c326be1d31172d03766dbc846782053b SHA-256: d108f44eb5b5da1a578bde01ca14dfcbc9c08066469cbec0b74a2660186d28ba
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://ggtraff.ru/strik?keyword=bobby+fischer+chess+games+pdf In PDF document text
    • http://files.thefranchiseleague.com/uploads/1/3/1/8/131871621/kikamonegex.pdfIn PDF document text
    • http://files.spiritedcocktailclasses.com/uploads/1/3/0/7/130775634/namekekebutomibib.pdfIn PDF document text
    • http://files.you-turn-drug-docket.org/uploads/1/3/2/6/132696500/kegesisezer.pdfIn PDF document text
    • http://files.beacondistributorsinc.com/uploads/1/3/1/1/131164164/zorivij.pdfIn PDF document text
    • http://duxisig.dxixprojects.com/uploads/1/3/0/7/130775195/db3a216b6af6e.pdfIn PDF document text
    • http://files.carriewhitneyart.com/uploads/1/3/0/7/130776228/004415455fee8a7.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/1/0430/0714/8185/files/griffiths_electrodynamics_solutions_4th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4456/9242/files/kekudowisibemi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2023/0564/files/xoragizefubazunivi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5209/0022/files/dejusur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5987/9834/files/numasafizuletexavatula.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/2016/7586/files/fifa_15_android_apk_game.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1685/5453/files/fesiraru.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_off00006311.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6311 5828 bytes
SHA-256: 236d1ebb7efd21ef236dd2c4270405cd3d2fd2e953ac69345686e2e7901bedea
font_01_sfnt_off000076cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76CB 9848 bytes
SHA-256: e54e33f0fe7d0efac1ecc7227e2f9512fdd0184c77f1a3f13dd5a476c3b6f952