Malicious PDF — malware analysis report

Static analysis result for SHA-256 79587d5ccf8c0ebb…

MALICIOUS

PDF

48.9 KB Created: 2020-10-27 19:11:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 804b30c4481c7c7be583b954e84b33c3 SHA-1: 73d1dfc8ff50adcf63b35dba63ef6af1bf4c2ba3 SHA-256: 79587d5ccf8c0ebb42444b5ecce5830a8088f28f91c0fefb83f08db82ba5ff2f
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/pify?keyword=harrington+on+hold%2527em+cash+games+pdf In PDF document text
    • https://jikajulimag.weebly.com/uploads/1/3/4/3/134319013/wifepegi-darakikatug-visiwij.pdfIn PDF document text
    • https://rofexigu.weebly.com/uploads/1/3/0/7/130738805/15bb762e86b.pdfIn PDF document text
    • https://jugubiwujivivej.weebly.com/uploads/1/3/4/3/134352954/zuxeliji_mabigoxutiwom_kinukana_pafuxetefa.pdfIn PDF document text
    • https://zusaneji.weebly.com/uploads/1/3/0/8/130813769/zipurivapajelagu.pdfIn PDF document text
    • https://xujaxivef.weebly.com/uploads/1/3/1/4/131438557/2232723.pdfIn PDF document text
    • https://digafixi.weebly.com/uploads/1/3/0/7/130776371/2ca16d7ea56f64e.pdfIn PDF document text
    • https://dujopoda.weebly.com/uploads/1/3/0/7/130739119/3038930.pdfIn PDF document text
    • https://sinepakeje.weebly.com/uploads/1/3/4/4/134490574/de05520000c74.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000739b.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000739b.bin)
    • http://www.daltonmaag.com/In extracted file (font_02_sfnt_off0000a752.bin)
    • https://cdn.shopify.com/s/files/1/0434/4178/2946/files/kenmore_ultra_wash_quiet_guard_troubleshooting.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/1535/4543/files/din_2532_flange_dimensions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0467/9778/3191/files/37091835886.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8845/4559/files/bonnlo_kayak_cart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b998bad4-2865-46f7-8116-8a024e60dd00/wavituvuraza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38c31d89-678f-440d-9ca3-9798257518cf/gta_vice_city_polis_modu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/063b9393-982d-48a7-b8c7-ab6bcd3edeea/momovugexiviwama.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7802ed17-2f53-4f62-a3cd-48e79bb9d1b6/31538652151.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0451348d-ef25-4f0e-b8b5-8739129a71d0/83138087879.pdfIn PDF document text
    • https://s3.amazonaws.com/geradi/advertising_management_calicut_university.pdfIn PDF document text
    • https://s3.amazonaws.com/dotivaf/articulos_cientificos_ejemplos.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/jumovidemijakoto.pdfIn PDF document text
    • https://s3.amazonaws.com/rekorewexidiwo/fanosamitajobanexa.pdfIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/similarities_between_dna_and_rna.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/north_west_corner_rule.pdfIn PDF document text
    • https://s3.amazonaws.com/wajufifenoxuj/maths_formula_sheet_for_iit-_jee.pdfIn PDF document text
    • https://s3.amazonaws.com/lixasifasi/81839720731.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_off0000739b.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000739b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x739B 5352 bytes
SHA-256: cca186dac7f8fa6dfc643d46ab6f83dcde9a3bfe99eb30389a29ff5bfea5d4e8
font_01_sfnt_off000085a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85A0 9888 bytes
SHA-256: b44399ca6c483f52cd8edff406bc82f3e5efcedc81b40bef1fca5cd0c524f2df
font_02_sfnt_off0000a752.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA752 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378