Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef30da38917923f2…

MALICIOUS

PDF

51.6 KB Created: 2020-10-09 11:47:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: b5840aac1fa6d831ebc70f1833a046bf SHA-1: 6ccaaebc7dd39ff01f0100c7144b8d2c11cd3383 SHA-256: ef30da38917923f224a3435888adc645db6652025809e52b6995faaf080f5628
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=magic+the+gathering+book+pdf In PDF document text
    • http://xivupe.prismnyc.org/uploads/1/3/1/8/131871590/447f09.pdfIn PDF document text
    • http://manite.carolinascentscandlecompany.com/uploads/1/3/2/7/132741099/1854810.pdfIn PDF document text
    • http://vetaridev.leo-theo.com/uploads/1/3/0/7/130776827/c80703a2496f71.pdfIn PDF document text
    • http://files.auntyjoys.com/uploads/1/3/1/4/131453980/7395207.pdfIn PDF document text
    • http://files.dragonpalmfitness.com/uploads/1/3/2/6/132681476/rofobibodibi.pdfIn PDF document text
    • https://site-1039270.mozfiles.com/files/1039270/57508364927.pdfIn PDF document text
    • https://site-1048523.mozfiles.com/files/1048523/satemejokafaxuxagi.pdfIn PDF document text
    • https://site-1038311.mozfiles.com/files/1038311/rajofedak.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/d57df0ad-aa14-4215-84a2-ef62bd47c982/86935116368.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3eee0b4-2440-4d31-a769-c3b99f079a67/zorato.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cd08aa6-52b6-4b50-a65d-a8881f09fe57/pudabaravizabavowaveg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c49d8f6b-afaf-4ffc-ba71-86e42b7b09da/mavajorejolofulax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/3588/8296/files/soft_heat_heating_pad_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/9526/4932/files/wogusagederugepubi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8475/0747/files/dibobixuzuwofebotafax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/2737/3473/files/2201737237.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8759/6182/files/50047630475.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 8

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_off00008204.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8204 5416 bytes
SHA-256: db8ccda967fba4529ec579f361110b8a1af2edca1cdb431fb694ac0249780748
font_01_sfnt_off00009476.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9476 14508 bytes
SHA-256: d7945b9f846ee398986b47ee70c3e32ff6ad9dd1e0443523b12fb25f8fe25aba

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