Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6c9d42c3c054e92…

MALICIOUS

PDF

68.4 KB Created: 2020-08-11 06:11:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: b3e61eb3ee9ebeaeb4d382de08f90787 SHA-1: 21ff5521bf911166db5800c26b9cfd7bbfbdc2bf SHA-256: c6c9d42c3c054e92da9d5d7d791b092c66d4733f43bbcad80545e783c8c3e43a
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=subject+verb+agreement+rules+in+bangla+pdf In PDF document text
    • http://files.iroquoismatildapastoralcharge.org/uploads/1/3/1/1/131164568/2140274.pdfIn PDF document text
    • http://files.davidwallacerealty.com/uploads/1/3/0/9/130969357/nenosewop.pdfIn PDF document text
    • http://files.honorfirst.com/uploads/1/3/1/0/131070493/gepapewunu.pdfIn PDF document text
    • http://files.tsangsuiyiu.com/uploads/1/3/0/7/130776632/fivijabeboxite.pdfIn PDF document text
    • http://zasegawaf.sankaraodisha.kannoli.net/uploads/1/3/1/0/131071252/zumowe.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/1/0432/4956/5853/files/biology_eoc_practice_test.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5096/6950/files/72331108917.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7616/5536/files/vapof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0245/4428/files/aditya_birla_capital_logo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5290/0250/files/9644620572.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3484/5079/files/bukepesapuvamusozejupasa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7532/1499/files/1383389137.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8671/6830/files/tizoromujokexijorenow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5192/6183/files/sisiwusizonerenalinufoda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3492/7513/files/astm_a36_standard_specification_for_carbon_structural_steel.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://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000988a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x988A 5852 bytes
SHA-256: 31945df0bf4c9b8412bda52c3858752083e5f4b364aec40c93d0e7c5ea28f118
font_01_sfnt_off0000ac62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC62 14208 bytes
SHA-256: e17402e433785da33de1b42c897e8ffa51a594ed85d7e85416ccef45820f2261
font_02_sfnt_off0000d69d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD69D 1800 bytes
SHA-256: e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
font_03_sfnt_off0000df2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF2B 10192 bytes
SHA-256: afd36ac013732b811a259deadfb3665687e42ec3533d244dff867ead3cbe5371

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