Malicious PDF — malware analysis report

Static analysis result for SHA-256 474f4beefbc36004…

MALICIOUS

PDF

77.0 KB Created: 2021-03-07 08:06:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: f891bc9620be958bb0e94481c675c985 SHA-1: 2fdba5a03b8af4eb4a964b17963afc9013fd12a8 SHA-256: 474f4beefbc360045bd1f4daa6164054021dd0f542f1c760f98313c753285de6
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, many pointing to disposable domains, suggesting a link farm or SEO manipulation tactic. The embedded content, though heavily obfuscated, appears to be a lure related to "Who owns igloo coolers". ClamAV and ML classifiers identified this as a phishing or malicious PDF, likely intended to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://xezojetit.ru/strik?utm_term=who+owns+igloo+coolers PDF link annotation
    • http://vashobereg.com/how_to_set_up_plantronics_bluetooth_earbuds_to_phonebj8p8.pdfIn PDF document text
    • http://wubufusimeveve.22web.org/beyonce_albums_free.pdfIn PDF document text
    • http://help-feedback-amzn8.xyz/contax_t2_vs_t3_photosqd3p6.pdfIn PDF document text
    • http://idealsit.space/90726394063zeb0g.pdfIn PDF document text
    • http://sitakog.iblogger.org/24495648292.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/87fddaad-d9d4-4feb-be52-deb219b6ca72/30486839161.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f361f5c-fa53-45d1-8eb6-178c9ad9959c/adding_and_subtracting_fractions_worksheets_year_6.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a20f567c-ff00-44b4-b5e5-51c7e9bdd362/synthesis_essay_thesis_statement_examples.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/001cf89a-403b-46b7-bc93-5880bcf742cb/netgear_gs116lp_review.pdfIn PDF document text
    • https://39c1d623-eccb-4af0-a86a-15328a2d61f9.filesusr.com/ugd/3cb6cb_efff092472b244899db580a679c39269.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/813b9d68-2530-427a-83ad-580d19bb3427/57453460360.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1b4f0c2-cda6-4d4e-9ce6-0b5eac517ef2/mukubitivubuforosametuk.pdfIn PDF document text
    • https://5a4e7950-e122-4b3c-9cf7-894e7f5b1216.filesusr.com/ugd/76aeb6_7706ca251c6849388c690dc1c65d5e4f.pdf?index=trueIn PDF document text
    • https://70848fb0-0fd0-490a-9360-2ffa38fc212c.filesusr.com/ugd/08e331_fb8e0f55a60b4956a6b67e57cf3a1d88.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/768d8da6-7f6a-4968-84aa-340d2e533222/fufisaruga.pdfIn PDF document text
    • https://e6b56e3c-1b88-4cfb-972d-ab1702b0a06e.filesusr.com/ugd/8c0e65_df293463e6f84f45ac5eb4b551187a87.pdf?index=trueIn PDF document text
    • https://c504e2ef-f928-4e80-b5b1-fc05046f432e.filesusr.com/ugd/247f25_c20411b98c364707a62ea4fedaaa110d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/64f76676-037f-4738-912d-200777b94793/redhead_gun_safe_accessories.pdfIn PDF document text
    • https://30b7a97f-6117-4fff-8876-4b3c2220b6c6.filesusr.com/ugd/15cd4d_6fbff9460c8e43ff848c49b66b495572.pdf?index=trueIn PDF document text
    • https://12350a4d-732a-4148-85a7-4fa27f2a77ec.filesusr.com/ugd/17beed_64707d912fe744fc8ca927ef987fd961.pdf?index=trueIn PDF document text
    • http://woxomog.rf.gd/duwatewavuluwapilijarolez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/daf9b595-d5c4-4158-8a58-c29663d1bc4e/jorezitimikamurudivuduji.pdfIn PDF document text
    • https://770ad53b-b55e-4e58-b1eb-3709f41304f7.filesusr.com/ugd/98e298_cd71b89e6af74a99beda9dea600238e6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b88af6f-b966-4ff7-adf4-7121fbdce236/how_do_i_contact_buffalo_wild_wings_corporate.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF0D 4956 bytes
SHA-256: 59126e3d7470b61f12751b015045e9d6fe35c0e5b2e8dc00f275e1e1cd1751b3
font_01_sfnt_off00010006.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10006 11184 bytes
SHA-256: ed72be3db07e195224c2d7a5d8f50a35ed590ae359ede7c628a45cac651893e7