Malicious PDF — malware analysis report

Static analysis result for SHA-256 50208dcd31b46ab2…

MALICIOUS

PDF

45.7 KB Created: 2020-10-15 06:42:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 377cfe81a7dd809588fd349383b53bca SHA-1: 72f44b39cfd39bb2b72499d163fba66a45d28174 SHA-256: 50208dcd31b46ab2db919938b11665381351ec73f137ff36e8d2980dc52b7863
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://ggtraff.ru/pify?keyword=wp+plus+g%25C3%25BCncel+apk In PDF document text
    • https://mogezisatizate.weebly.com/uploads/1/3/0/7/130775403/bujikuvap.pdfIn PDF document text
    • https://wurikosaradusif.weebly.com/uploads/1/3/1/3/131384544/ea159dcf7d98.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/xizaxamuxive.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/laresisif_kigadebokenub_bajutinerid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366973/normal_5f872dc638298.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366031/normal_5f870b4d4b068.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366003/normal_5f877c8ead440.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/1/0430/7619/0361/files/35046552680.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/2386/8319/files/receta_para_jamon_con_pina.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/2613/9294/files/notch_battery_bar_pro_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df5eb3ab-e425-4abf-9e4c-62273682af81/gujufivuvilisigiwazejebi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8c25842-725a-4061-a262-ea9a0408d55b/xepubizujepukotelosaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b47529f-69e9-4bb2-b29e-06845c64ed36/11233291231.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb106cec-8fea-4c82-b467-92cd4dfbc501/68681940194.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8878/2506/files/atascadero_school_district_youtube.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1992/6679/files/american_tour_guide_crossword_clue.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2258/9853/files/natural_frequency_of_cantilever_beam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/5753/2065/files/ps4_division_2_open_beta.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/7922/8320/files/98303016680.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8788/8535/files/20358988366.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9333/7264/files/28438782079.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000611f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x611F 6744 bytes
SHA-256: 0eac1552a6a0cc8d6d43e14f5c157d052ff2bf21460314f67a2c213e0a454e63
font_01_sfnt_off00007206.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7206 5204 bytes
SHA-256: 9c20d9f2d4bc781abcee734d12edf9721fab148712680c4049872fe635a013c8
font_02_sfnt_off000083aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83AA 11344 bytes
SHA-256: b28694416df7d23849f98bbb3132994a22ee3741f03f4b9c1c2a7ac39fc32258