Malicious PDF — malware analysis report

Static analysis result for SHA-256 7942ab2df56123e5…

MALICIOUS

PDF

37.3 KB Created: 2020-08-12 17:34:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: ae1b59aea8dc24bf12cc71b9175b3311 SHA-1: a279074531fb01683e30c1f7f8d8eb49d6ed790e SHA-256: 7942ab2df56123e5bac2343576cfab5e9333c7c389d82345f85d17cf5fdba8fb
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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.ru/pify?keyword=introductory+mathematical+analysis+ernest+f+haeussler+pdf+download In PDF document text
    • http://files.perashlaw.com/uploads/1/3/0/8/130874655/9324ddb601872e.pdfIn PDF document text
    • http://files.ricoproduct.com/uploads/1/3/1/3/131381756/pebokezuda.pdfIn PDF document text
    • http://files.ryanshay.org/uploads/1/3/2/8/132815123/7535583.pdfIn PDF document text
    • http://files.lawqms.com/uploads/1/3/1/8/131872149/vimasedodivojopuwig.pdfIn PDF document text
    • http://jipup.welshbaskets.co.uk/uploads/1/3/1/6/131606490/2bb693633.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/1/0433/2394/9224/files/dosavutakalelofuzodow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8631/5684/files/95498352007.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/9311/2472/files/use_of_computer_in_hospital_pharmacy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3050/3843/files/nudexudokul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8891/2290/files/ridixerotarapoleb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5851/1510/files/fepirugofobokajukoja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2353/2195/files/vipudimogipesoruzisu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9101/7374/files/darufe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0432/1177/files/gutigefuxoxu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6799/8359/files/77302182713.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7948/9950/files/manorama_year_book_2020_malayalam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1332/5471/files/vigaxokekajiwuboda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8812/4830/files/53528635391.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_off00005401.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5401 5528 bytes
SHA-256: 82825ba3d6c60093320c4c97178a1ba266f453993d9c2f87042cd8724bbc4a2c
font_01_sfnt_off000066ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66AD 9496 bytes
SHA-256: fa48bbce3838f27dd391ac8886a91bc35ebf37e346beac422c070a68d1a4c25d

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