Malicious PDF — malware analysis report

Static analysis result for SHA-256 c972e0fbf484177b…

MALICIOUS

PDF

86.4 KB Created: 2021-04-01 23:57:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: f49072b6fa378721cdec5fc3b94e5c46 SHA-1: aec254e237ae38bfba246a2bdf6d2f76315f613c SHA-256: c972e0fbf484177b9d8082c48d486259a51244c6a081516614b08b20f89d3855
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to numerous external URLs, including one hosted on disposable infrastructure, under the guise of providing ketogenic diet information. The presence of embedded URLs and the link farm structure suggest an attempt to drive traffic to potentially malicious or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • 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://druttle.ru/award?keyword=dieta+cetogenica+cardapio+completo+pdf PDF link annotation
    • http://gufutaca3.xyz/mavejeniwoduduxaps6g6q.pdfIn PDF document text
    • http://praktika-ingenieur.com/third_grade_math_worksheets_printable_multiplicationg60pb.pdfIn PDF document text
    • http://itdiscounts.pro/fofofunekuz4q6d2.pdfIn PDF document text
    • https://xiforamuti.weebly.com/uploads/1/3/4/6/134611992/5c420.pdfIn PDF document text
    • http://nunopasatipimav.medianewsonline.com/mizinukuvafivo.pdfIn PDF document text
    • http://lnstagramverifiedbadge-form.com/woxasuxobujogojopizomozedipu3v.pdfIn PDF document text
    • http://kefudepoduwudi.sportsontheweb.net/12768500015.pdfIn PDF document text
    • http://bivitajuteje.mypressonline.com/cellule_animale_et_vgtale_schma.pdfIn PDF document text
    • http://kernig.online/kakikinolivadovutimerifuxn3hn6.pdfIn PDF document text
    • http://lafarupikawa.22web.org/ak_jain_practical_physiology_free_download.pdfIn PDF document text
    • https://safusugefivelu.weebly.com/uploads/1/3/4/3/134346528/vebefemiguwemopi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bowudegirimesuf.epizy.com/best_survival_movies_in_hollywood.pdfIn PDF document text
    • https://917ed8d3-8a9f-4c5c-a3ad-554e533308ad.filesusr.com/ugd/a4e402_8826aea1e2c34701b557ab6ed4568b9c.pdf?index=trueIn PDF document text
    • https://aa6d2f86-95e2-42cc-897e-6bbd71c3a116.filesusr.com/ugd/78daac_7b326985250144d38606713e8a899bef.pdf?index=trueIn PDF document text
    • http://vonanovab.epizy.com/the_complete_ketogenic_diet_for_beginners_free.pdfIn PDF document text
    • http://jipudovisubu.rf.gd/momabifiwenanijufubuvivex.pdfIn PDF document text
    • http://gudanomakorake.epizy.com/love_whatsapp_status_video_mp4.pdfIn PDF document text
    • https://438e95ed-c264-4db5-88d3-1a9ca8b91b86.filesusr.com/ugd/733c1f_d251a879b68f45c48b2c72ae092224e5.pdf?index=trueIn PDF document text
    • https://923a8ca3-316b-4844-b38f-9bc955ad4852.filesusr.com/ugd/312e0e_5fdb92af449e4a89ab0141cc205f5612.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a17c264-a7ff-470d-8e1e-dfe9183a2036/john_deere_345_mower_blades.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4941700-2e92-461b-b59f-3a848c143667/tonudorufetagedit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8219aedc-488c-4d99-bfd4-b671ff6518a6/monster_super_league_damage_calculator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52da0eff-767d-41a3-ba13-bd7dc3a1a08a/pride_and_prejudice_chapter_18_summary_shmoop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ff8b19a-2969-4ac3-ae07-ae90769f02b6/vampire_diaries_season_6_episode_8_cast.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_off00010fa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FA0 5296 bytes
SHA-256: 7aaad6ac42a9125989d4ddeb833b0fb8edbf0af61e229a69e5197f09d1f6409c
font_01_sfnt_off00012199.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12199 13352 bytes
SHA-256: f22d6286ba8e554651c7ba6ed60520e4f5c69cbcdd1ebd382f6b0fb20dbb1f57