Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b36034139335cbb…

MALICIOUS

PDF

49.0 KB Created: 2020-08-18 20:32:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 1ea59fd49846c2d722f1fbfee066985d SHA-1: 27a434e6e3a5dcc120ac5d1ff099357a008f1712 SHA-256: 6b36034139335cbb3ee94eb3398aa94ad2b30120b6cf94378b5136eb3ff5969f
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.cc/pify?keyword=checklist+format+printable In PDF document text
    • http://files.one-mission.net/uploads/1/3/1/4/131482821/debule.pdfIn PDF document text
    • http://zenape.sonomavalleyhighschoolart.com/uploads/1/3/1/4/131406453/tezapuzowave_xusemepabonu_sopadagoneporej_mavupusolexub.pdfIn PDF document text
    • http://files.manilaaudioclub.com/uploads/1/3/1/1/131164476/ccdfc2ba0aca.pdfIn PDF document text
    • http://rumid.stemteachershou.net/uploads/1/3/0/7/130775354/mimova-xivur-lowalukoxopike-kuziseveb.pdfIn PDF document text
    • http://files.lenaseikaly.com/uploads/1/3/1/8/131856195/genudalolagotid.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/1/0436/2086/0067/files/302420577.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6345/9486/files/pumidovevubufimi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3772/0733/files/8208550153.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3021/6855/files/xiwemos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4389/5966/files/11804905157.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2823/1830/files/1450998432.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5369/5647/files/83997149632.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5192/6183/files/biztalk_2016_cu4.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0796/5341/files/13663934447.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_off00006bc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BC4 5364 bytes
SHA-256: dee1433f1553bbcc25bd276b66ed160ff7ef29a5cfd58f6c3c9914617dc62823
font_01_sfnt_off00007dce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DCE 10112 bytes
SHA-256: 607fefc26cd0702e3a8b202cd6f997092c68430c7de451ae4ba0c0b31321c6fd
font_02_sfnt_off0000a0ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA0AB 16336 bytes
SHA-256: 222845ee8c3b5b1127c439977ff0e454c8fdca8c7109c613deb4c5f3f84abcaf

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