Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad1a13e0a41f9a33…

MALICIOUS

PDF

44.3 KB Created: 2020-10-09 00:09:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: bed4779be6dafd08ee3b5b1ddb20a052 SHA-1: 7508c13cf3661059f5d2fdd53ce4773044eaf8d8 SHA-256: ad1a13e0a41f9a33fb1a6a9d4890547886e73b3afaa5f6e2a7fe71a655653530
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=sick+leave+application+for+school+pdf In PDF document text
    • http://voderadi.urbanconnoisseurs.com/uploads/1/3/0/7/130775990/sazod.pdfIn PDF document text
    • http://jusarode.patsartstudio.com/uploads/1/3/1/3/131380177/kudud-divijenar-raridujezapagek.pdfIn PDF document text
    • http://files.carolynforest.com/uploads/1/3/0/7/130739779/c6262a4ef3cc.pdfIn PDF document text
    • http://files.susannebrandstaetter.com/uploads/1/3/1/4/131437984/8695114.pdfIn PDF document text
    • http://files.culvercitysymphony.org/uploads/1/3/0/8/130874324/jewunaluliri.pdfIn PDF document text
    • http://gekinaw.grumpygrind.com/uploads/1/3/1/3/131384436/7258413.pdfIn PDF document text
    • http://tejigu.hopedwellsblog.com/uploads/1/3/1/6/131606008/lokesarukabibaja.pdfIn PDF document text
    • http://files.vaporhauschicago.com/uploads/1/3/1/4/131437667/pimud.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/a38c9056-8b0e-4345-9869-b78416715013/94536810292.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ab2d6d6-983d-4500-929b-26bae61bdd00/joluwagux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6f6ba06-10b1-41a4-8e25-85040682ab57/33087978231.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fae16509-1708-46b7-8f5c-9dc967385520/gadiwupamijizukevimuzex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/6726/4164/files/dewalt_scroll_saw_light.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9929/0776/files/26242141222.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3172/2146/files/dragonvale_mod_apk_android_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4953/3088/files/slow_cooker_cabbage_roll_casserole.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7063/6710/files/8995781566.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

Related samples 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E54 5468 bytes
SHA-256: 7136837986e49928ab2cc7ba51571b37aa290774e547b236a4c16a62144f65da
font_01_sfnt_off000080f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80F6 10344 bytes
SHA-256: a45693c7fafb6686b55670c7901d8a24c768e3ece12ac83efe853f5bc989e544

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