Malicious PDF — malware analysis report

Static analysis result for SHA-256 e811e707f7f22e99…

MALICIOUS

PDF

46.9 KB Created: 2020-10-25 20:22:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 16a09cef1a069a5850051211db1b3dc2 SHA-1: abc0561a1b0c2270c84adbac715676ac8b5763d5 SHA-256: e811e707f7f22e9968e896c758addff15bb374b68c3c8cf408a4a8f4cc2abd67
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=esv+literary+study+bible+pdf In PDF document text
    • https://jeponiruwapin.weebly.com/uploads/1/3/0/7/130776483/gufiz-bimugil.pdfIn PDF document text
    • https://kizekusoviwo.weebly.com/uploads/1/3/1/4/131453028/bogimazetudika.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/3409757.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/7d3707d5d.pdfIn PDF document text
    • https://debaduvevuw.weebly.com/uploads/1/3/4/3/134383420/gumakuf.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006c46.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006c46.bin)
    • http://www.daltonmaag.com/In extracted file (font_02_sfnt_off0000a05f.bin)
    • https://cdn.shopify.com/s/files/1/0268/7238/1637/files/choque_cardiogenico_tratamento.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98dbf630-e42c-4975-866b-57fe9ec93307/24199838295.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/252d6742-352e-4d04-84f7-52c860266274/pepalebijap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e6ae451-320b-409d-a27d-5bec2f072a63/vomifumodewudusokivek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28c411cb-14b3-49b8-aace-e80f07766380/49616199458.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/169ed072-f926-44a9-b1c1-a06d191d455c/33992424548.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6ee13e4-80cd-43f1-8bcb-753e3245b085/79730010583.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e114f628-8fc9-4932-b794-b4893f4243d6/zebolelazixezokevulomel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f4a5839-f4ec-40b2-93e9-3c3d52648125/10007018649.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4104/7206/files/anton_chekhov_three_sisters_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0487/0491/3558/files/63114296273.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/4535/6198/files/how_leopard_got_his_spots_story.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1502/0449/files/10921615546.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/025240c0-c72e-4d72-a9d6-db656be289de/45440466997.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6077ec48-6d7a-4062-aef8-ff67f7cf3c64/20_poemas_de_amor_y_una_cancion_dese.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_off00006c46.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C46 4960 bytes
SHA-256: 39c0d5f3bc3a4d2a63ad25a62fa066eaab8c8e261dcd4b4c2ba26db270a3863e
font_01_sfnt_off00007d34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D34 10256 bytes
SHA-256: 3c502a22ee954d70cc6e048eb66ed46b24aa5c432c46a139bc98797e20b6118c
font_02_sfnt_off0000a05f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA05F 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c