Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbfc2ab8adf5433c…

MALICIOUS

PDF

65.2 KB Created: 2020-10-10 11:23:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 32babd47360fdcdced9030396895f602 SHA-1: 70d67e8b6113456af4693dcad64b043e496b7de6 SHA-256: fbfc2ab8adf5433c514fe2f01fe70b665df7216d89babb9267d8ac6e38d5e628
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/strik?keyword=m%2526m+character+sheet In PDF document text
    • http://files.honeypotscrubs.com/uploads/1/3/0/7/130739043/gazogulegopizu.pdfIn PDF document text
    • http://files.midwestalliancesoccer.com/uploads/1/3/0/9/130969938/65d53.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3699/7792/files/craigslist_mendocino_county_jobs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8543/8884/files/73744187620.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2548/9305/files/best_weight_gain_pills.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/2581/3663/files/pink_bobby_mcgee_reaction.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3846/5435/files/nogizediwivuwurudabi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/841f8e66-bc10-45d9-849e-f8436b66a075/74094041353.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d56a179-6ea7-4c42-bacd-6bbe35bf6a71/88015553528.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a05c63a-fbcb-48c7-a9f6-7af1bf11a9c6/89392948403.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90f625d2-60d5-40b6-a6e7-75dd1b813cb4/wonogipugeb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fc17f1b-4aa4-4418-b4c4-dc02252571da/vedewuwuxirigedowuki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/9052/1501/files/bubowevesodol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/5582/7094/files/wosarulalekupuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4257/0401/files/94334197942.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000948e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x948E 3488 bytes
SHA-256: df5b803312c48d59b559c58557403d3f35eb1c4399c3b55d94ed0bbeb13f3094
font_01_sfnt_off00009ff7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9FF7 11116 bytes
SHA-256: d3efaa5110dc432f684b99aef21f4379d9ec37b477c1d9e9605c0c60369c4773
font_02_sfnt_off0000c528.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC528 16172 bytes
SHA-256: 16ee75368b2ab9358ac0a0a9cf067e6a53663326ac7824fbe48bd138a3e2e077
font_03_sfnt_off0000da49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA49 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
font_04_sfnt_off0000e80b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE80B 6064 bytes
SHA-256: c4d1a78e40a9ffdcca2a54d4ab7aab073c15f1422e6133731b2362e88640fc81

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