Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ddbf36796beb334…

MALICIOUS

PDF

47.9 KB Created: 2020-10-20 21:30:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 1626370bd59276113c88adaa8cae063b SHA-1: 1bad6008825c0246a9cfe4c49e5b92708df63e33 SHA-256: 7ddbf36796beb334e63934ac1e0b31ea76c18cf5d24e1005961856a07a5070bf
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://gettraff.ru/123?keyword=arabic+alphabet+writing+practice+sheets+pdf In PDF document text
    • https://jewajufigojoxi.weebly.com/uploads/1/3/1/4/131438211/e607d2a.pdfIn PDF document text
    • https://zoxaminajoge.weebly.com/uploads/1/3/1/6/131637873/doginoxitexeret.pdfIn PDF document text
    • https://xusawoji.weebly.com/uploads/1/3/0/7/130739635/f4323d91b.pdfIn PDF document text
    • https://togitarusufojir.weebly.com/uploads/1/3/2/6/132681229/8aa0ee91.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/029f16b4-449f-4238-a1b2-bdd74e7769a3/rikufizolumabitugida.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb3b43aa-51bf-42a3-8bea-ec6fb8498434/32981711650.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c33eaa12-0d8c-4e2e-9f35-6bf89d3ec8f5/tinizapatagiputube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84099213-baba-4514-8808-28b656cc8898/rofakasodamevowike.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/201c06c4-b502-472a-8a75-6e0c17fdff57/pukavowesusamik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7288769d-2632-4f5e-b70c-2a613da9ddcf/9583473813.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebac209c-1b8a-405e-a762-93fe5b9023e0/19338611325.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56f2e000-8cf0-444a-a2aa-564e7cbec040/never_enough_piano_sheet_music_full.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0773c111-f79a-4861-8916-21f4a590b6d7/79039249384.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/880a722a-b86a-4801-affa-469c00f93cf0/mifuripawuxoluwivoxunag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/503778ab-0582-4925-8265-1b361d873bee/tabilowupo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7a2c4fa-72c5-4c0c-baf2-c4a81485ae00/scentsy_fall_catalog.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005def.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DEF 5640 bytes
SHA-256: f2e8fedf1294d8423b4173c8fccc67005a19496fb9162882194f4867d95a0313
font_01_sfnt_off0000711a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x711A 10608 bytes
SHA-256: f20fd1509547c87301b0036dbdfe5a18c12b7205da305b3011e98cf4a43bf1ad
font_02_sfnt_off0000953b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x953B 18948 bytes
SHA-256: ad6d65c7313191107b39a59e361ff2dfb2ce25feaf981014b7e060eb0c925f59

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