Malicious PDF — malware analysis report

Static analysis result for SHA-256 06fff2de6411d5b0…

MALICIOUS

PDF

91.4 KB Created: 2021-03-19 17:48:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: fec44d5f8bd48957f415a258e1a48630 SHA-1: c636f63dfdd009b3f7edfb5a73db2afc8f198076 SHA-256: 06fff2de6411d5b0876a53051e787f8f5642a74b22bb270a8639068f6fa80814
136 Risk Score

Malware Insights

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

The PDF contains a high-confidence ML detection and ClamAV signature for phishing and malware. It includes an external URI and an image lure that redirects to the URL 'https://nipisod.ru/strik?utm_term=golden+sun+dark+dawn+best+djinn+combinations', indicating a phishing or malware distribution attempt. The document body is heavily obfuscated, but the presence of PDF-specific heuristics and the overall verdict strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://nipisod.ru/strik?utm_term=golden+sun+dark+dawn+best+djinn+combinations PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4449181/normal_5fe88d453b39e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449419/normal_6040f800bda3e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417658/normal_6046e34b03d6c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414849/normal_5ff8edfcd8806.pdfIn PDF document text
    • https://cdn.sqhk.co/jufebarur/ja7Edic/the_travels_of_marco_polo_summary_tagalog.pdfIn PDF document text
    • https://cdn.sqhk.co/salavogi/fv4jdZ3/biology_class_10_book.pdfIn PDF document text
    • https://cdn.sqhk.co/vavetiset/gfgfDgg/rififokozedaturuto.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410027/normal_5ff32e4110a8e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380867/normal_5fe2beb6a7286.pdfIn PDF document text
    • https://cdn.sqhk.co/nijalemivowo/5eida9b/8285461475.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371261/normal_604f1e063f3ee.pdfIn PDF document text
    • https://cdn.sqhk.co/jilebodetifa/chA0n0T/mambo_bundle_get_up_to_20gb_free.pdfIn PDF document text
    • https://cdn.sqhk.co/kamupudoro/gehhwp2/studio_code_artist_answers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450340/normal_5fd650e05ff37.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zolerazowubow/pioneer_fh-x720bt_microphone_not_working.pdfIn PDF document text
    • https://s3.amazonaws.com/toguvaju/sopa_de_letras_cristianas_dificiles_para_imprimir.pdfIn PDF document text
    • https://s3.amazonaws.com/voxulija/prince_of_persia_two_thrones_download_for_pc_ocean_of_games.pdfIn PDF document text
    • https://s3.amazonaws.com/bejeseja/90522314207.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001190f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1190F 3756 bytes
SHA-256: 435768ef123a611e2b62d022cb6d46b781822a33e4818cf26ed6ca621a9484e9
font_01_sfnt_off0001265f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1265F 5488 bytes
SHA-256: 6acce4b065c96b2f849fde03fe18066ad67c773c0490ab7c5a716c7905ad80c7
font_02_sfnt_off0001390c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1390C 11412 bytes
SHA-256: 86ea2a3b3c5b8a8105658eb7510723e617f8c99e9195487a6a13def5efeaf208