Malicious PDF — malware analysis report

Static analysis result for SHA-256 829c8852399a0ee9…

MALICIOUS

PDF

54.4 KB Created: 2020-10-01 17:14:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: be9dace4b6495f5db4a68d15cdce63a5 SHA-1: e54101de81076ba1778ec3886fbbcbda9cfff477 SHA-256: 829c8852399a0ee9a4b3f6debf6f7cf6c2d2e7fce62289c51543d99bc90b1aa4
202 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/strik?keyword=anemias+hemoliticas+extracorpusculares+pdf In PDF document text
    • http://files.myarus.com/uploads/1/3/0/9/130969083/nowosasidipixug-kisovaw-pakakamoxejinib-zolifusebuki.pdfIn PDF document text
    • http://dotebi.bridgestoserbia.com/uploads/1/3/1/4/131438729/dokolo_litobi_xejodoza.pdfIn PDF document text
    • http://files.torontoacademyofacting.net/uploads/1/3/1/6/131606630/fekeru.pdfIn PDF document text
    • http://files.walkingstick.org/uploads/1/3/1/8/131857655/6713709.pdfIn PDF document text
    • http://files.louisacrispinart.co.uk/uploads/1/3/0/7/130776327/tinatukerijixukilo.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/b094cd94-6bb0-4768-bc86-db8dc590c3f7/18486803000.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcec5c0d-f9dd-44d8-863d-37d67755fac8/lonesuliwivowepakawasim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b19766ce-3426-4782-a57a-d848c6df3954/tiverojozas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0458/5658/7929/files/david_beckham_fashion_brand.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/dime_piece_urban_dictionary.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/3051/4330/files/serufenud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/0028/5342/files/89263794739.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/2564/0857/files/7260910426.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 7

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_off000096f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96F9 5452 bytes
SHA-256: 22d2310f0aab1f7b994c3d86d780cb83d06c838b8deb7f342875ccae380b95c3
font_01_sfnt_off0000a95c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA95C 10316 bytes
SHA-256: ab99a8c7601b8e402cffe8461dafa662bbd1757026ef7163b8b69db3ca278658

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