Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b20290cdde8f922…

MALICIOUS

PDF

41.1 KB Created: 2020-10-26 05:19:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: b1ad20548a9090a4811f143ad83851de SHA-1: 1f56e882489595b236242e26bfbea2b9b39f72e1 SHA-256: 1b20290cdde8f922472061b02006fb694ccc8d987ea38a71013733454223d295
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=administracion+de+los+recursos+humanos+bohlander+pdf In PDF document text
    • https://morekifozolil.weebly.com/uploads/1/3/4/3/134332894/3129789.pdfIn PDF document text
    • https://gimunoje.weebly.com/uploads/1/3/4/3/134344093/1589788.pdfIn PDF document text
    • https://bilewobadazape.weebly.com/uploads/1/3/2/6/132695578/zezejiz_pofuwuxutix_xogenosi.pdfIn PDF document text
    • https://wefejakero.weebly.com/uploads/1/3/0/8/130814310/c107d04e.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/vovofofaverun_sawivurovoj_nifawubazox.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00005ecd.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00005ecd.bin)
    • https://cdn.shopify.com/s/files/1/0493/6115/8303/files/xinapafagiropaladirima.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/7481/7693/files/find_someone_who_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7628/1031/files/19947349615.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/3272/6680/files/nitig.pdfIn PDF document text
    • https://s3.amazonaws.com/dutimajizowa/positivism_approach_to_research.pdfIn PDF document text
    • https://s3.amazonaws.com/sukobogixe/septa_127_bus_schedule.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/negative_effects_of_globalisation_in_zambia.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagoba/calligraphy_fonts_alphabet_a-_z.pdfIn PDF document text
    • https://s3.amazonaws.com/pafiganovavi/kadek.pdfIn PDF document text
    • https://s3.amazonaws.com/dadupawo/canara_bank_account_opening_form_download.pdfIn PDF document text
    • https://s3.amazonaws.com/zamuriza/css_books_free.pdfIn PDF document text
    • https://s3.amazonaws.com/mujevubutukoxu/futaserol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3696d8fb-d396-4f68-8df2-9e388f4d5e0a/apple_dumpling_gang_rides_again.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ba5e533-5f1e-492c-a58a-67542ad819e2/13548613410.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96dc95ac-ea9d-4eba-94f4-f0cad7c37a37/vowuzugijofe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1642a10c-f98b-42e7-a257-b383a1aff04a/litemafi.pdfIn PDF document text
    • https://s3.amazonaws.com/toguvaju/ser_bachiller_2018_junio.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/98507179505.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_off00005ecd.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ecd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5ECD 5524 bytes
SHA-256: 87c80d9f943b34e741b2f8675a6696a43e7009b7998f9496f634f4ebc8c76f62
font_01_sfnt_off00007157.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7157 10668 bytes
SHA-256: 6004a50b2b995ec19eafcd0d4298782d2f90d733ad44017c8d2768a37a8eee81