Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f567956edb652ba…

MALICIOUS

PDF

41.6 KB Created: 2020-10-09 14:00:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: d9103299ab33ea2a1754789b45461275 SHA-1: 35bcdf166e36cd48ee3f36b2bc555c3672747adb SHA-256: 3f567956edb652baa0ea6dbf69c16c3bd7af0149858f8830fe7be439c1bd5658
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://ggtraff.ru/strik?keyword=mac+adobe+flash+cs4+crackeado In PDF document text
    • http://lebonanoj.owentales.com/uploads/1/3/0/7/130740292/patukigun_lisepazofurumi_kewutiwukuz.pdfIn PDF document text
    • http://kuvik.donboscoyouthincubator.net/uploads/1/3/2/7/132740541/514a364cd3d805a.pdfIn PDF document text
    • http://files.davidowenbooks.com/uploads/1/3/1/3/131378990/bijix.pdfIn PDF document text
    • http://fitatux.mcmoniglek.com/uploads/1/3/0/7/130775244/39d342.pdfIn PDF document text
    • http://sojenojo.ruhligphotography.com/uploads/1/3/1/3/131379351/9564484.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2100/9053/files/67038186884.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1737/9750/files/southeast_region_states_map.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/4386/6792/files/2008_6.7_cummins_egr_delete_instructions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3837/4050/files/18306477221.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/9031/3884/files/skyrim_dragon_priest_mask_krosis_location.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3030/5178/files/fajitakofotabowoxil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0487/0055/5414/files/dickinson_county_sheriff_michigan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/7181/9942/files/stainless_steel_manual_hand_press_juicer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9879/4912/files/capitol_hill_school_okc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/509c6f8b-b3dc-4429-addf-582823302d6e/29520804196.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0953fb05-a8a6-4efc-ab56-8c1f99b68de1/88303034692.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b20f5d8c-bd20-45b9-8378-a6edc621b64f/lelalixofawerewujisuradog.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_off0000653f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x653F 5404 bytes
SHA-256: 30074c58d33883055f32c28658dc244a450bdc5407d693bf75063b74827b88fa
font_01_sfnt_off000077a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77A9 9964 bytes
SHA-256: faa301bdddaf8f84d3e739b59a7188d44db170dcd130ac7a1ea213a5acf1f4d6

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