Malicious PDF — malware analysis report

Static analysis result for SHA-256 62a72957c148129b…

MALICIOUS

PDF

65.3 KB Created: 2020-10-15 09:30:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 1d3465e0218ecd6b95868f40f32ecd0e SHA-1: f42eebb4469f6c3315c48ad9632f37a2d9b4e829 SHA-256: 62a72957c148129b3974e12e3500525c57eaa97a3dcd09e90e384dfaa2eee0c0
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://gettraff.ru/123?keyword=microcosmic+orbit+mantak+chia+pdf In PDF document text
    • https://site-1038561.mozfiles.com/files/1038561/tugurezijaratulawasap.pdfIn PDF document text
    • https://site-1043752.mozfiles.com/files/1043752/16717328158.pdfIn PDF document text
    • https://site-1045415.mozfiles.com/files/1045415/furudigutesi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365624/normal_5f870ac01db0c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368504/normal_5f8782f6a1c2b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366035/normal_5f87b17550a4b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366321/normal_5f8735963092a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366031/normal_5f87407af0c2a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366401/normal_5f8774a1c100c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366661/normal_5f879dd0a82d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366313/normal_5f875edf66fbb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365549/normal_5f872d6ee9e65.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367923/normal_5f87a92fb40a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367912/normal_5f87b3ac48b7b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4768/0162/files/34966826770.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/3193/2311/files/49676218487.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/2820/1639/files/12004059983.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1898/3323/files/ap_statistics_chapter_5_reading_guide_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/4310/0069/files/resetar_android_samsung_duos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/2763/0744/files/80144219688.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D78 6564 bytes
SHA-256: 4fbc130972b4fd7de3c32bc11c4ac3e90ff1164073d8eded54534dec183ba020
font_01_sfnt_off00007db7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DB7 3372 bytes
SHA-256: 4539811b5cd8e7051f1e16ecae6b236d5c3b98cd4bc250051e4dd24f87a6de3f
font_02_sfnt_off000089ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89CA 5244 bytes
SHA-256: be986c2fe0161b014259bb7d8991fa05f71d4958d7ef4d728f7b90b2de082d40
font_03_sfnt_off00009b53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B53 15424 bytes
SHA-256: 659b91da74e2e919a1d07c8b6ac9696811f199424a7199a32b66fba059a29267
font_04_sfnt_off0000c585.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC585 9992 bytes
SHA-256: c53f88783c30b4b1a2a3ba1d30c8aac931d852dc394a06c2ffe41fa197791644
font_05_sfnt_off0000e7ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7BA 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176