Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5abf5685670222a…

MALICIOUS

PDF

42.4 KB Created: 2020-10-18 04:44:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 14a54f8ad99cebd58b98125b8716a2b1 SHA-1: fa0d2c964dba7b621fa7515e8f0f635184b3bb46 SHA-256: c5abf5685670222aa04d2e03f6f55ac439575eb2e7428dfb0b5b8cb04b95e15b
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://ttraff.me/123?keyword=the+escapist+crafting+guide+xbox+one In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368750/normal_5f8b63c47fa5c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365621/normal_5f8759a725fb8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367952/normal_5f87772101b3b.pdfIn PDF document text
    • https://fisotewefupug.weebly.com/uploads/1/3/1/0/131071176/87d295001440.pdfIn PDF document text
    • https://dirigesibujov.weebly.com/uploads/1/3/0/9/130969991/ef7064233070876.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/sokilijaw.pdfIn PDF document text
    • https://segakimorepej.weebly.com/uploads/1/3/0/7/130738797/6bca93a01d.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/1/0436/0926/0190/files/75230106884.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/0623/2229/files/kuwegimis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0698/3829/files/doluvebolefeje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8197/4435/files/68417027587.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1064/4377/files/section_26.2_stars_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/6714/1017/files/crochet_pattern_for_knitted_knockers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9481/1832/files/anderson_middle_school.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7479/8247/files/grundlagen_algorithmen_und_datenstrukturen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/6633/8711/files/93235818625.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/2166/1856/files/30164359787.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3284/5207/files/78185798434.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/1392/9630/files/advanced_image_search_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/3884/6359/files/dumavudanim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c65c52f2-09b1-4319-904b-cee2cba213e4/jinozodetuzezazowab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85ec3ccb-7276-458a-9c27-743d1b4061fd/disovikovigedinutonugis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7d0268a-5b0b-4501-ab4d-b5a781e8c6a7/vikojo.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_off0000679b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x679B 5540 bytes
SHA-256: 994abd27ce294bc473e563f52972ae6fbafea100d2b4cfe330c90ffe638fa86e
font_01_sfnt_off00007a65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A65 10020 bytes
SHA-256: f03bd7721d8132b8c21f2dc9277bf6642775dd9e84342b8deeb0a7ce158f323c