Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ab65e5d669bbff5…

MALICIOUS

PDF

42.2 KB Created: 2020-10-14 02:00:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: cab6c55f976df291f20df1a8ce437628 SHA-1: abe610bb420f847c8f1709b9c27dd480456084ec SHA-256: 6ab65e5d669bbff59289b118ec8219dc871324bfd0d9b7d0f356af892e291cd3
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=assets+folder+in+android+project In PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/3722212.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/xizaxamuxive.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/lonevu.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/vunidixeviro_xitosujitupile_kadape.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/tugunari_fogeze_nezejavoz.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/18ad995.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/bagatazojiz_sidatasofugugor_sofaxazute_gureluf.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/3e75a4e696b2f2d.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/39fc0c11-ede3-458f-b469-6011e66d7e97/72249129494.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c075e5a3-892f-403d-a32a-915f0a82579e/wememuvuneziwodifu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13557ebb-1992-49ed-8728-4114d5282293/bowumu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5447376f-f5b5-4742-a21a-f417461eeec2/52980951949.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3de8605a-3ea6-43ec-87c2-9522430a44fa/70452180936.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46ad48f5-3995-4ebd-88a1-377c3fb2be55/86609368766.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/001c326c-45ea-4a35-a36e-117905ac5965/19040534158.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_off000066d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66D7 5212 bytes
SHA-256: b7eba4128359194a0321c83e747092008856dcb5d211bdc77daca36f83fc318c
font_01_sfnt_off000078a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78A1 10416 bytes
SHA-256: f4ed26311c780205ed9d1b983ee014d6a841229fc87517b1d966d0a3ae1ba0c1

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