Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfe52dc3854a1329…

MALICIOUS

PDF

78.5 KB Created: 2021-06-09 10:28:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d869930880e79fc7c5540d1e182b0974 SHA-1: 9df701b6c73aa1fc489a99a813dd1599963a89ad SHA-256: cfe52dc3854a1329566c7941bca5b03705a92b5cba01dc7ecd3ac6f3c14b88dd
194 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://wastran.ru/pbw?utm_term=need+for+speed+underground+2+setup+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4465394/normal_5fea0cb340a40.pdfIn PDF document text
    • https://piladokad.weebly.com/uploads/1/3/4/7/134759874/8578822.pdfIn PDF document text
    • https://fenatafu.weebly.com/uploads/1/3/1/6/131637570/daba3cef3df598.pdfIn PDF document text
    • https://vekejuritikoj.weebly.com/uploads/1/3/1/8/131857631/norowot.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425224/normal_5ff9d870cd609.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459636/normal_605d94dd3616c.pdfIn PDF document text
    • https://weniwekozeg.weebly.com/uploads/1/3/4/0/134012595/1186141.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jurekugi.pbworks.com/w/file/fetch/144933825/teatv_apk_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e2bce87-2125-4603-b569-dba246cb7a57/lenovo_thinkpad_t430_bluetooth_driver.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/befb1f8d-5f0a-4205-8dfb-bd7974deb381/16876225119.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06ee0a18-1967-4d4d-9ff7-438a41ac5dcc/kawokozarafukejefamepinez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06840519-5855-45a3-ab96-026ad4799c8f/natural_way_to_draw_out_blackheads.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbbe718a-ab42-414f-afc5-4f4d6c3fbb5e/an_edible_history_of_humanity_chapter_3_summary.pdfIn PDF document text
    • http://vixifalino.pbworks.com/w/file/fetch/144763917/starting_out_with_programming_logic_and_design_5th_edition_download.pdfIn PDF document text
    • http://wuvebag.pbworks.com/w/file/fetch/144427758/maselorenixilatoferov.pdfIn PDF document text
    • http://karulimomaw.pbworks.com/w/file/fetch/144915339/26653996316.pdfIn PDF document text
    • http://zuwuzemoj.pbworks.com/w/file/fetch/144920598/quick_yoga_workout_for_beginners.pdfIn PDF document text
    • http://tukufidanega.pbworks.com/f/can_you_restore_whatsapp_from_android_to_iphone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0afe646-5022-4490-979f-ea7a4ce2cf37/miraculous_ladybug_new_york_special_release_date_in_south_africa.pdfIn PDF document text
    • http://ridelox.pbworks.com/w/file/fetch/144666882/jepiful.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d0062ee-e1c4-4de4-b318-c7d35f391fc7/my_cousin_rachel_download_full_movie.pdfIn PDF document text
    • http://jukozatixul.pbworks.com/w/file/fetch/144704604/tirewaxujodulazip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/619b6c95-3971-42b2-b638-8597f24954e3/28904605075.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_off0000e56c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE56C 3056 bytes
SHA-256: 383de28b9aa3baae7e761585a69e6fa3fa7bb7dcabd0abc505436b5e94e2cca3
font_01_sfnt_off0000f064.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF064 5404 bytes
SHA-256: 9cbc7e994169d17cd0ed6fafedbcfc824b4ea56a6931bfb9abd457fc08d072f2
font_02_sfnt_off000102f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102F1 12312 bytes
SHA-256: 500c415fe61f0bc342451f58b376c82731b2d91a6b312bb34678cd641fe72780