Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f9b43213593c11c…

MALICIOUS

PDF

43.8 KB Created: 2020-10-30 23:28:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: b82957334b792f8c47c6585688c1aeb7 SHA-1: 6ba9a4054361a7890c429730de7ef014b2a86dbc SHA-256: 2f9b43213593c11c50ff6bef8d347c5cf72065a55e56267a05f7a47b96685253
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/123?keyword=honeywell+true+hepa+allergen+remover+hpa204+white In PDF document text
    • https://cdn-cms.f-static.net/uploads/4375528/normal_5f8ed2a589459.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373788/normal_5f8b42f8e6217.pdfIn PDF document text
    • https://gumiworawogulaf.weebly.com/uploads/1/3/4/3/134356348/a5070d31dc74.pdfIn PDF document text
    • https://pisanofinupu.weebly.com/uploads/1/3/1/4/131437881/8332929.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/f2210ece-7142-476e-9dc0-523659409f19/56386478275.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4449/4750/files/santorini_bus_map.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/verizon_kyocera_flip_phone_sim_card.pdfIn PDF document text
    • https://s3.amazonaws.com/tixedujegibex/56748261452.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisigetizoxif/69153350246.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/1642/3077/files/wheely_2_apk_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5885d07f-e470-47db-a5aa-9ebea4689bc5/81551859707.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/4797/4579/files/caterpillar_c13_service_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/kevava/to_whom_it_may_concern_letter_sample_word.pdfIn PDF document text
    • https://s3.amazonaws.com/lokijuronig/92111642385.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_off000069f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69F6 5632 bytes
SHA-256: 75dad5b6b2cecfa46b760d9d07286f44e87e7824e1e8efb2987cf567b7e09257
font_01_sfnt_off00007d21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D21 10876 bytes
SHA-256: 5f0a1478adb9a56502f768079a15c9aca6e8fa5f416fb2980fb8de384892d860

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