Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbb7d1e5a8130921…

MALICIOUS

PDF

63.4 KB Created: 2020-09-25 15:35:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: b8cf8d452537b5dfc47e57d77a7ee5de SHA-1: 2f4a895883775474b10fc930b99c501b93eacec9 SHA-256: fbb7d1e5a8130921b5c24b12f488f1e53a4f6ae920fb6f70b32d02ea958fbd1d
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=bsa+geocaching+merit+badge+requirements In PDF document text
    • http://files.americandisposalservice.net/uploads/1/3/0/7/130738875/zalogotalilev-xelujegene-zadobaz-fugomuxoxir.pdfIn PDF document text
    • http://files.pemun.org/uploads/1/3/1/3/131384081/3121893.pdfIn PDF document text
    • http://ferotebe.portlandtraumarecovery.com/uploads/1/3/1/6/131606227/wurubipanusawel.pdfIn PDF document text
    • http://penuv.vankleekhillnaturesociety.org/uploads/1/3/1/4/131406895/c8d37b5a2b07.pdfIn PDF document text
    • http://files.floralgreenspublishing.com/uploads/1/3/0/9/130969818/gekodidex_kexetivet_jifoxixepuw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.thdl.org/http://www.thdl.org/TibetanIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1851/0745/files/16365728097.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7515/7670/files/46244158010.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0094/5048/files/nintendo_3ds_android_emulator.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1571/6513/files/systemic_vasculitis_treatment_guidelines.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/9264/2465/files/mezosogafapipuligef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/2917/2122/files/solving_quadratic_equations_examples.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5201/4491/files/86292073105.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.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlTibetanIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a01e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA01E 5636 bytes
SHA-256: 6654ef036cb9c05387bceb0a9bc5246c21bf1d1c4ac5fc9bf80d434b60a396c1
font_01_sfnt_off0000b318.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB318 9204 bytes
SHA-256: 5235a9ef7d9eb2c031223c23f24cd9ad2a50561f9bb7bf729a46b44e4331137c
font_02_sfnt_off0000c580.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC580 13412 bytes
SHA-256: 1b265875b4abd8f896404ef184916aed49418def6aef9821a33291a03589def8