Malicious PDF — malware analysis report

Static analysis result for SHA-256 e404d48d0e8366e0…

MALICIOUS

PDF

82.7 KB Created: 2021-04-23 01:35:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2e58e6aa8e78eeb6fc90a5edc00a2b69 SHA-1: 6a606a7f455e901ba35f582f078793c39cdf6c7a SHA-256: e404d48d0e8366e0a2e566109507a9db5d446903a8eaca4e7ee70d9bef34e389
164 Risk Score

Malware Insights

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

The PDF file contains numerous external links, characteristic of a link farm designed to improve search engine rankings for specific keywords. The presence of a 'download button' heuristic and ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests malicious intent. The embedded URLs likely lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://zajinet.ru/strik?utm_term=quran+pak+only+urdu+translation+pdf+download
    • https://tukumexof.weebly.com/uploads/1/3/4/7/134721389/6364125.pdf
    • https://cdn.sqhk.co/todiwapubu/hgyiEii/tidapamajenumuwava.pdf
    • https://zirodamabesad.weebly.com/uploads/1/3/0/7/130740068/tojerididupaniz.pdf
    • https://cdn.sqhk.co/fokivetezabu/PhdiicR/evergreen_747_supertanker_cost.pdf
    • http://xurijozidarov.22web.org/xumoxevofovavisugaz.pdf
    • http://nisiwitas.22web.org/citric_acid_cycle_pathway.pdf
    • https://cdn.sqhk.co/ferobisuw/bnuhhji/space_wolves_codex_9th_edition_vk.pdf
    • https://cdn.sqhk.co/refowofiros/WihTic1/home_arcade_machine_cheap.pdf
    • https://cdn.sqhk.co/supesuvepo/ehe8MkT/46567360538.pdf
    • https://pufabakorulur.weebly.com/uploads/1/3/4/3/134320636/763911dc0.pdf
    • http://bedusopuzal.22web.org/agrarian_reform_program_officer_duties_and_responsibilities.pdf
    • https://cdn.sqhk.co/fapulatonupe/icNhj8M/j2ee_design_patterns_cheat_sheet.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://tigefaxoweta.rf.gd/tevegunerefabukafuxipam.pdf
    • https://uploads.strikinglycdn.com/files/8113952d-09fe-430e-8bad-09a45afeabd9/zopovepumo.pdf
    • https://uploads.strikinglycdn.com/files/372e3ad6-7595-41fc-9ede-8040cf8359fa/tobipazajexafopogi.pdf
    • https://uploads.strikinglycdn.com/files/06eb9c86-50ae-489b-a60f-7c9b1537de81/57678051418.pdf
    • https://uploads.strikinglycdn.com/files/a38b5e63-2b28-41d8-a107-89eafb050533/which_university_is_best_for_automotive_engineering_in_uk.pdf
    • http://ribowofipap.rf.gd/august_monthly_calendar_2020.pdf
    • http://favukimasinete.rf.gd/19538555644.pdf
    • https://uploads.strikinglycdn.com/files/52f9ade2-6651-437f-8df0-e25ddfbc18bb/rainbird_5000_sprinkler_head_arc_adjustment.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00010f5e.bin
1a598e8a83de619e35ee3d7a4541fbc1446723b3a2130e5d0716c3159a97a983		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x10F5E 19328 bytes
font_00_sfnt_off0000d1b8.bin
401ae88e555be694c1d87e2520d4b86f1fd805c08f4fbcb378327aa65da63896		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD1B8 5120 bytes
font_01_sfnt_off0000e334.bin
a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE334 1800 bytes
font_02_sfnt_off0000ebc1.bin
d7a476966ee919cbf5b030490c5549e6c61f05e8e7a292a0bae09b127173d1ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBC1 10376 bytes
font_04_sfnt_off00012e81.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12E81 4324 bytes

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