Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcc160d14f5f92d5…

MALICIOUS

PDF

77.5 KB Created: 2021-05-14 11:21:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 74a30bb4bb59742964d592cabda5b6b8 SHA-1: 90c736095ff4a5c9f628cb061c0f25896f778703 SHA-256: fcc160d14f5f92d575df3c0801d16b2d75db414876dbb626d2c6e0b1a77ba873
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, which is flagged by heuristics and a machine learning classifier as malicious. The document body, though heavily obfuscated, suggests a theme of fitness and diet, likely a lure for a phishing or scam campaign. The presence of an external URI indicates an attempt to redirect the user to a potentially harmful website.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jacksth.ru/strik?utm_term=what+not+to+eat+to+get+in+shape
    • https://cdn-cms.f-static.net/uploads/4455901/normal_5fd28a5a38e41.pdf
    • https://cdn.sqhk.co/surudije/gc1sghL/1591568754.pdf
    • https://cdn-cms.f-static.net/uploads/4376357/normal_6058529d4d8da.pdf
    • https://cdn.sqhk.co/nukunudakiju/nrygfig/video_alffy_rev_official_asian_games.pdf
    • https://cdn.sqhk.co/wadusazilox/AjjhhhM/37046024742.pdf
    • http://xufunuduxatene.iblogger.org/quick_heal_antivirus_for_server_free.pdf
    • http://mastera-saydinga.ru/3832224888y2458.pdf
    • https://static.s123-cdn-static.com/uploads/4373986/normal_5ff49d84e2628.pdf
    • https://cdn.sqhk.co/dikapagoloza/GjdJEPq/democracy_definition_us_history.pdf
    • http://fsbsiod.com/gogofodazhql1.pdf
    • https://cdn-cms.f-static.net/uploads/4406464/normal_60627bd3be8f5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/rujimidujek/affinity_photo_for_ubuntu.pdf
    • https://uploads.strikinglycdn.com/files/91901a5f-e1cf-4836-898b-237418e6e19c/how_to_fix_maytag_dishwasher_control_panel.pdf
    • http://rebefagor.epizy.com/84935637290.pdf
    • https://s3.amazonaws.com/nakevoja/94703794436.pdf
    • https://s3.amazonaws.com/poguvelefa/progress_in_mathematics_grade_3_textbook_download.pdf
    • https://uploads.strikinglycdn.com/files/202dc019-8e2b-4abc-bfbb-d7d032e2b167/98983071646.pdf
    • https://uploads.strikinglycdn.com/files/75fb589d-dabe-4d38-aae4-d3524e3a2e94/funniest_pet_rock_memes_tumblr.pdf
    • https://uploads.strikinglycdn.com/files/9490ea94-2e7b-49ac-8714-ec385750cbbf/nezakububepejurovumaka.pdf
    • https://s3.amazonaws.com/buganabowumujef/breville_oracle_touch_user_guide.pdf
    • https://s3.amazonaws.com/bomifabipi/how_to_start_a_small_business_in_dallas_texas.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1db.bin
0e62c5982ea8d2836ab3af0aeff5e65526ff6d9a5ea10880aaccda09de10e06c
pdf-font-stream PDF embedded font (sfnt) at offset 0xF1DB 4964 bytes
font_01_sfnt_off000102d3.bin
0004ef2ea8f9128f5e12efc131a63c48621d7ea610ec5fff9138fd7db61939ae
pdf-font-stream PDF embedded font (sfnt) at offset 0x102D3 11076 bytes