Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab2c39b29b9c1085…

MALICIOUS

PDF

45.2 KB Created: 2020-10-26 10:03:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: eacf7c9391b43aee9e13949a5270bb66 SHA-1: 017889d8fa29d04b47010c898990c70a7d1e7b2c SHA-256: ab2c39b29b9c10850f6c718f99ca8bfc0ca2c0a9ca543028b1b6047aacb90067
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://cctraff.ru/aws?keyword=brand+identity+examples+pdf In PDF document text
    • https://mufalugibesenu.weebly.com/uploads/1/3/1/4/131453255/d1fa50eb8c6.pdfIn PDF document text
    • https://wipomozexabezi.weebly.com/uploads/1/3/0/7/130776841/2494499.pdfIn PDF document text
    • https://mogijoduvide.weebly.com/uploads/1/3/0/8/130814471/3223528.pdfIn PDF document text
    • https://mozosuroje.weebly.com/uploads/1/3/4/4/134456199/taroduma-nubifizuta.pdfIn PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/xopevu_vilugarokobijos_fimorekon.pdfIn PDF document text
    • https://pevugubak.weebly.com/uploads/1/3/2/7/132740457/kijovemafup.pdfIn PDF document text
    • https://fexejolimoti.weebly.com/uploads/1/3/4/1/134131812/sugod_nuvulutuvob.pdfIn PDF document text
    • https://medizagokitoni.weebly.com/uploads/1/3/2/3/132303310/sakorigaveriluparixo.pdfIn PDF document text
    • https://wejibuxod.weebly.com/uploads/1/3/0/7/130740202/4a550224ba01a7d.pdfIn PDF document text
    • https://vunatoja.weebly.com/uploads/1/3/0/7/130738644/e44c90f.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off000070be.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off000070be.bin)
    • https://cdn.shopify.com/s/files/1/0502/7604/0889/files/anatomia_patologica_sistemica_veterinaria.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0314/9479/files/apc_smart_ups_750_user_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7831/0295/files/97546946436.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8115/7796/files/65166071862.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/6656/2966/files/mevuvisuxizosasi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2454/0071/files/counting_change_practice_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6107/6387/files/branchial_cyst_surgery.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/8067/9064/files/72177711075.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/9784/0539/files/niwuvom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6601/5395/files/nukurapedisikimuvegap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/2546/3968/files/ib_english_hl_paper_1_structure.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5101/5579/files/7th_dragon_2020_ii.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 extracted file (font_00_sfnt_off000070be.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000070be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70BE 5408 bytes
SHA-256: 2d0ae0ed2e74e34b1cb728adb9634702d5dbb930eb700f229a352d72eb5783b1
font_01_sfnt_off00008314.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8314 10556 bytes
SHA-256: 071f19d281ad794ad6e9bef169e5a1c97ee5418b6e9a85acdca91b1d19c1e20b