Malicious PDF — malware analysis report

Static analysis result for SHA-256 c37fd34bd68f912a…

MALICIOUS

PDF

44.9 KB Created: 2020-10-25 18:12:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: f928d51cc879a06862b034b0887d47a6 SHA-1: f985577c3528b3e57a453cd2bd48254b254f9442 SHA-256: c37fd34bd68f912a2bc1a772e16de0f0256d46ca9743f1633ed53a4cbd38a393
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://gettraff.ru/pify?keyword=math+multiplication+worksheets+6th+grade In PDF document text
    • https://lerexujirizafet.weebly.com/uploads/1/3/4/3/134344290/fajajowelezofezikabo.pdfIn PDF document text
    • https://kokexofagisukop.weebly.com/uploads/1/3/2/7/132710589/dojab_dubinojodofe_nuwafofewugadug_faxodu.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/lokujevu.pdfIn PDF document text
    • https://nobigifawu.weebly.com/uploads/1/3/4/3/134310244/konaxatitufi-gunoraki.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/41a07dc0-61fd-4caa-8bf2-d9af28ff6b47/5187599027.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c5554ec-bb16-4ca0-af55-9c9a927b0af5/puxamiseroraremoduvaberaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1b4bf52-ee37-440b-99b6-6d91b343f9fc/76289771160.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5be68a1b-3048-44f3-8f70-2b250e0a0ca5/light_iron_los_angeles.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6929/0149/files/nsdl_new_pan_card_application_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/7065/2061/files/msi_z87-g45_gaming_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2661/9287/files/strait_line_sonic_laser_tape_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6035/3429/files/jefamuxuxeberejubeti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2721/0144/files/zifosolunoxewakug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/4793/1042/files/handbook_stoeltings_anesthesia_coexisting_disease.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/0398/8126/files/the_invasion_of_the_tearling_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3874/2440/files/mythica_the_iron_crown_full_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/donake/biocentrism_by_robert_lanza.pdfIn PDF document text
    • https://s3.amazonaws.com/sizadagazagaj/53850322511.pdfIn PDF document text
    • https://s3.amazonaws.com/jewizopukuni/40007473403.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a5dca50-1484-4d58-a1f0-beb2a5f449a7/linear_algebra_5th_edition_by_friedberg_insel_and_spence.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0951ee38-171a-45dc-8586-224423a21538/jobowugem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89fbb5d0-7ac0-461c-a50b-f4fb0044b4f6/forgotten_realms_campaign_setting_3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7a1047d-7a1d-4e3a-8b8f-64f3d996148f/11783515159.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05db5103-8382-4323-94f3-9e7d7c11e63b/77894248555.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_off00006e27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E27 5800 bytes
SHA-256: 794193ad1f1ed3afb68dc46429bd99c7326cbf427b5eba978905ffce17347793
font_01_sfnt_off000081ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81CE 10840 bytes
SHA-256: 1bcbb4fc948e19e44f6e081a5a24bdbb70a59bd240718db68a7bbe17b219722c