Malicious PDF — malware analysis report

Static analysis result for SHA-256 27d1060d0f167338…

MALICIOUS

PDF

53.6 KB Created: 2020-10-07 18:09:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 82ce3fde5a6e372cd50d88013f4a9c2d SHA-1: 98a76f0aca38e8b2814a968f497d791807393af6 SHA-256: 27d1060d0f167338cf981de6931f29259f215d7595fa9fee8373cad29808bbea
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/pify?keyword=sternberg%2527s+triarchic+theory+of+intelligence+is+based+on+what+following+theory In PDF document text
    • http://jezuzoli.nnis.net/uploads/1/3/2/7/132740478/magelufi-panixudezu-relemufip-wejeroza.pdfIn PDF document text
    • http://ninonavur.winnebagoarchersinc.com/uploads/1/3/1/4/131406121/222093b1735c.pdfIn PDF document text
    • https://site-1038869.mozfiles.com/files/1038869/wezujim.pdfIn PDF document text
    • https://site-1038595.mozfiles.com/files/1038595/muwozuvolabagopumefanisaf.pdfIn PDF document text
    • https://site-1036874.mozfiles.com/files/1036874/93791986027.pdfIn PDF document text
    • https://site-1037098.mozfiles.com/files/1037098/samavinob.pdfIn PDF document text
    • https://site-1043093.mozfiles.com/files/1043093/rikefelofewebikezin.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/1/0432/5598/8374/files/dn_leveling_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/1690/3585/files/59210474910.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9897/1038/files/nomenclature_worksheet_4_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0144/6554/files/dakunilugezitafugud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/2484/3420/files/97142069012.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/609d21c6-1992-4a03-8405-9d2a449fe91e/zafasebiwelukazaraxut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae1740fa-069a-46b5-b398-0eb1d0ae5575/94241723007.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33cb4f53-d10a-408d-a2ad-785c46c99e11/85857763699.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6385225-a753-4fdd-a011-2345ad1d19f1/67118378408.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000857f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x857F 5540 bytes
SHA-256: a2452eb47056297325b9ed602baef7bb7da94d47783865b8f70d35a9ae704097
font_01_sfnt_off0000985f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x985F 10040 bytes
SHA-256: a9e6458a8730c25c7577b553a98a4e162b233513754cc433835d7e1a45dcfba4
font_02_sfnt_off0000bab1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAB1 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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