Malicious PDF — malware analysis report

Static analysis result for SHA-256 42f1c1c8d7a61719…

MALICIOUS

PDF

60.4 KB Created: 2020-10-28 02:21:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 9bbd6c3375d0962137c15d8fcd1b06a6 SHA-1: 4defcab5f67e7a4453346997040fe124ec81cdc5 SHA-256: 42f1c1c8d7a6171969113e5b78b420ac8046bd47011a75efa25ad1952576b7a9
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/pify?keyword=golden+guide+insects In PDF document text
    • https://gojemafofapuvog.weebly.com/uploads/1/3/2/6/132681271/dupeni.pdfIn PDF document text
    • https://gogebuzavoriro.weebly.com/uploads/1/3/2/6/132681212/3761234.pdfIn PDF document text
    • https://folemazilepi.weebly.com/uploads/1/3/1/1/131164248/4402972.pdfIn PDF document text
    • https://kivuligob.weebly.com/uploads/1/3/0/8/130874143/zuronuvef_bazakulanigipe_bofufuvup_xininideweruve.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376120/normal_5f91080c30451.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380887/normal_5f9085302869f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365636/normal_5f8e4d10423ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368962/normal_5f8a38d040025.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412588/normal_5f97b9c00d71c.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/1/0430/6773/6225/files/fb_lite_app_apk_latest_version.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/7895/8235/files/sovowurekus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7373/1741/files/rotate_pages_ipad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/7065/2061/files/yoga_nidra_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/wunojipu/patofisiologi_asbestosis.pdfIn PDF document text
    • https://s3.amazonaws.com/vitelitubovuluj/jasowatoboj.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxawetawupo/durabejalo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1666/6786/files/super_deluxe_burger_delivery.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9050/0001/files/juju_bag_cafe_new_orleans_2019.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7700/0611/files/inferences_worksheet_4.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/7142/5697/files/definition_of_distance_education.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/4467/4979/files/sepemokipixovaxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bfadc20-061c-4b79-a5f8-9be9b8c3015b/komoroduj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cd69021-eead-4212-96ef-716e41235f24/8638933490.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/020d4ce8-042a-429e-9341-f35e468cbb59/dezodip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7279dc1-75d3-4dde-92e1-899de96702fa/16278737269.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_off0000add1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADD1 4832 bytes
SHA-256: d855e00d72bad0eb407e5b6e16bd061c6d8365aab2482b07b64c7c50875937c6
font_01_sfnt_off0000be5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE5C 11288 bytes
SHA-256: 3d6a1ba49b286d74c11e71c544e1d77cd9f6edc2a4f253ed13df5ae3ecb2b8e6