Malicious PDF — malware analysis report

Static analysis result for SHA-256 d07db52e713363de…

MALICIOUS

PDF

42.4 KB Created: 2020-11-07 11:21:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: f3aae982980fa7abc9d1aeefd1cfff4f SHA-1: 88b17ae726d783ae5dbad4ef4bb490890bb0b7f9 SHA-256: d07db52e713363de874d23f9b63fd5ad864984175f386183e122ae2d9a28d737
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://traffine.ru/aws?keyword=national+sorority+of+phi+delta+kappa In PDF document text
    • https://cdn-cms.f-static.net/uploads/4411493/normal_5fa052a8d1f23.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378390/normal_5fa663f89f045.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420230/normal_5f9b01c8982a2.pdfIn PDF document text
    • https://terarawuterojuz.weebly.com/uploads/1/3/0/7/130739827/duxakinisa_najalub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407314/normal_5f9a78e7c6994.pdfIn PDF document text
    • https://pejopazuzaguwoz.weebly.com/uploads/1/3/2/8/132815183/4618019.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/90268d99-3756-4d74-b464-ebc229fcf963/8_snf_matematik_soru_bankas_indir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8dce4326-7afb-4fb5-8b1d-228c3e83ace5/comcast_xfinity_guide_not_full_screen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b505895a-3f89-41b8-983d-b22216480ae3/87871955305.pdfIn PDF document text
    • https://s3.amazonaws.com/vasofirida/okuma_guide_select_pro_rod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1178e71-b397-4a5f-8b93-591cc19ea577/10071703319.pdfIn PDF document text
    • https://s3.amazonaws.com/fodose/stay_hungry_stay_foolish_rashmi_bansal.pdfIn PDF document text
    • https://livanizimof.files.wordpress.com/2020/11/another_world_is_possible_david_mcnally.pdfIn PDF document text
    • https://s3.amazonaws.com/jixerubowi/howl_s_moving_castle_free_online.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_off00006754.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6754 5264 bytes
SHA-256: b638ac54d7bd6089dc233a92408bdbb42f68f314e781e4638461a3a1095db7a7
font_01_sfnt_off00007945.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7945 10404 bytes
SHA-256: 32a4020a7582e81d6463f68c7b184394658361f783b63d1c21c8f6b018027468

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