Malicious PDF — malware analysis report

Static analysis result for SHA-256 2537785a7d02e78a…

MALICIOUS

PDF

54.8 KB Created: 2020-10-15 11:43:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: d0476153371f9a0f76af5bb75e29ba7a SHA-1: 245285b2864c54ef4699e49161fb99a3ac96f954 SHA-256: 2537785a7d02e78af0d61e87db00acc6dede1cbce16386b518e37da7fd1869ba
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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/123?keyword=manually+install+sccm+client In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365563/normal_5f8744575a5d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366385/normal_5f8787ab804dc.pdfIn PDF document text
    • https://fupexorugukemig.weebly.com/uploads/1/3/0/8/130814763/2382158.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/1109957.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/jibigamefomoni.pdfIn PDF document text
    • https://ridolagu.weebly.com/uploads/1/3/0/7/130775195/e09811dcb321b.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/1/0498/9317/9550/files/kubajat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/2564/8797/files/do_peculato_mediante_erro_de_outrem_culposo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/2624/2472/files/small_group_communication_definition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/4538/6902/files/fast_facts_palliative_care_hiccups.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6899/7284/files/share_jesus_without_fear_outline.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/0192/7064/files/kilede.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/0390/4676/files/29828996182.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8580/0645/files/65497165266.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/5964/1025/files/64918970855.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5127/7726/files/xezaxuwevokajagizo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/2754/1409/files/94449803111.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8597/8018/files/gekexiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/6984/9767/files/super_parental_guidance_full_movie_free_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9879/0301/files/27541666518.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8543/8884/files/radezowaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6827/5353/files/upside_down_v_symbol_military.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0365/7887/files/cvent_api_user_guide.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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007075.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7075 4728 bytes
SHA-256: 65704ecad65cf63e03d6abd0f3bb8fcfffc5d7186e524e56a9b0e52097009990
font_01_sfnt_off00008072.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8072 13220 bytes
SHA-256: 08cb16a3e20d954980f03cc7e18ca429cc2d2c95068e88e0c5ba823bb2f9073d
font_02_sfnt_off0000aaab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAAAB 16060 bytes
SHA-256: d78d7cc1a68daa951b4fbccbcfb906d5a08ad384f187125596154666a45abe72
font_03_sfnt_off0000bf40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF40 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361