Malicious PDF — malware analysis report

Static analysis result for SHA-256 4298a182ce14383c…

MALICIOUS

PDF

44.4 KB Created: 2020-10-10 11:12:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: f8716bace3356d4d1bc58aa90df9b332 SHA-1: 74e769d7fdd21e1a4cf64619b535ad5ad3adde6c SHA-256: 4298a182ce14383c7afe101773e34f40f7ae4b600ac39f048b6327a65ebae943
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://ttraff.club/pify?keyword=glo+warm+heater+owners+manual In PDF document text
    • http://files.futurepoint4business.com/uploads/1/3/1/0/131070109/pebajigapotekoge.pdfIn PDF document text
    • http://files.westmountwildrugby.com/uploads/1/3/0/8/130874379/69c4993d76a12.pdfIn PDF document text
    • http://files.deespassionateworld.com/uploads/1/3/0/7/130739059/8798861.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/fe981c19-813f-4cec-a606-0ac244fd291c/rorevokerafovenigibilu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/0041/6414/files/zagifivodaselevom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0371/5489/files/1337097728.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/0010/5624/files/pozudibokomekezu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8532/3168/files/science_skills_center_high_school_district.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2174/5822/files/50780848944.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/3212/8917/files/gikatut.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F98 5048 bytes
SHA-256: d5b66fce97fee1a8f1458b5f1f1d82cba122ee0d6141a3c3f6d18d8c895f3d02
font_01_sfnt_off000080a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80A7 10580 bytes
SHA-256: f04c88cd49937b726a25ce89650003154a05c1879e926c38803a80469297ec7c