Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc578dda14d9d039…

MALICIOUS

PDF

56.4 KB Created: 2020-10-17 13:26:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 5e3d76cf012fadda0a03a06d56533d83 SHA-1: 0570ed96d2f21074ee66c6f5c00deb930923f22a SHA-256: cc578dda14d9d039cee1e8fe510cfb47a30bbffe5de413caa8840abe728f5629
234 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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://cctraff.ru/strik?keyword=why+is+discord+so+laggy In PDF document text
    • https://rabexowubomisuw.weebly.com/uploads/1/3/1/4/131407155/tudibesepoma_megite_vowewo_bojejomagujalox.pdfIn PDF document text
    • https://varipejat.weebly.com/uploads/1/3/0/7/130739080/355adb6fa2.pdfIn PDF document text
    • https://tiwilofudux.weebly.com/uploads/1/3/1/6/131606348/c28393.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/7989682.pdfIn PDF document text
    • https://sakuvida.weebly.com/uploads/1/3/0/7/130775714/8693383.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/sulusilalope-jobede.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/4d5351fbb209c0.pdfIn PDF document text
    • https://pigogokeda.weebly.com/uploads/1/3/1/8/131857695/9e8409928.pdfIn PDF document text
    • https://jukafubu.weebly.com/uploads/1/3/0/8/130874261/revowo-mutitikiva-wiwegovinajo-tuxatusejuze.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/1/0438/3699/7792/files/craigslist_mendocino_county_jobs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9038/5823/files/dorian_yates_blood_and_guts_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/8199/7717/files/emulator_app_android_en_pc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/1970/5761/files/vugedaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0505/0008/files/bovizutikiximawok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/861713c4-54f9-4855-a006-e836df68f44e/tigaruzuwilotarorikubeza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06db678e-4502-4459-8d8c-3063cff51f51/18655352853.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de230aad-7c22-46d1-a58e-4af4f32e6da3/helium_by_rudy_francisco.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44883d65-9033-4c85-9358-9d28eb1a3146/43458065219.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63ba63b7-dc1e-4b94-bfa3-c9ccdbfe9455/jerivimifaxeg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e41b1fa8-dd68-4c03-82c7-f8c86ebb8a98/sorunitevolikudo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94cfc2ad-08ba-4d7d-a12e-a6f6b79381bf/ladofovokowubedakefaxokib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/3180/9176/files/netgear_ac1200_extender_as_access_point.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9102/4280/files/when_did_christianity_become_the_official_religion_in_ancient_rome.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007b9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B9A 5316 bytes
SHA-256: c0335a74891f7fa6caf2d39c563756b0daf4f0aba8e81c8d7a7afb38a4588436
font_01_sfnt_off00008da9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DA9 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off00009636.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9636 12112 bytes
SHA-256: d2163d3b57234e931fb57d95b90fe9329c923096fde9159227893a3af4569c64
font_03_sfnt_off0000bd9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD9C 16340 bytes
SHA-256: 76c03893711faee543228099e3564024ccf8ba461c16c9c30997de2507ed997a