Malicious PDF — malware analysis report

Static analysis result for SHA-256 12af72cbda3bd2aa…

MALICIOUS

PDF

96.2 KB Created: 2021-03-11 14:03:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 8a5b61ca053ba8381a8f7d6e88fa4b08 SHA-1: 04d0f27e1681c2353355fc01e2cd0d250426ed58 SHA-256: 12af72cbda3bd2aa1ae256bd2cfb464b2102dc23d796f5181578056a591c2bcd
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to 'Asia s space race pdf', likely intended to trick users into clicking the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/award?keyword=asia+s+space+race+pdf In PDF document text
    • http://atomyimperial.ru/kitchen_banana_yoshimoto_discussion_questionsxh78f.pdfIn PDF document text
    • http://theplafond.xyz/tokyo_ghoul_re_kaneki_wallpaper8be77.pdfIn PDF document text
    • http://santand-es.com/19902139592eikrq.pdfIn PDF document text
    • http://sluzhba1.net/2017_chevrolet_traverse_premier_owners_manualwoeju.pdfIn PDF document text
    • http://metikinave.22web.org/do_marxists_believe_in_capitalism.pdfIn PDF document text
    • http://lanufutado.22web.org/libro_hoffman_algebra_lineal.pdfIn PDF document text
    • http://neojust.ru/how_to_fix_a_stannah_stairliftgreoo.pdfIn PDF document text
    • http://nasufulorejuwe.mywebcommunity.org/kenneth_cole_reaction_analog_digital_watch_manual.pdfIn PDF document text
    • http://neyroskakalka.site/92592494563w4tsg.pdfIn PDF document text
    • http://virnet77.ru/liberalismo_economico_e_politicotifrs.pdfIn PDF document text
    • http://mnclassis.org/videoder_apk_latest_versionxx5z5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tuxabatadifu.onlinewebshop.net/visual_basic.net_download_for_mac.pdfIn PDF document text
    • http://puloxivomavari.epizy.com/30236422683.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8318aaf-a0f2-49d4-aaa4-af90020dff40/fuxoguluzuros.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/202de52e-9454-4f6e-acbe-13a6e7330577/bosch_300_dishwasher_installation_manual.pdfIn PDF document text
    • http://kuzotekekejepun.rf.gd/advanced_korean_vocabulary.pdfIn PDF document text
    • http://letutemoxeluz.onlinewebshop.net/yamaha_rx-v573_specs.pdfIn PDF document text
    • http://lusuzajemofim.rf.gd/the_batman_who_laughs_comic_espaol.pdfIn PDF document text
    • http://kaporeko.rf.gd/icse_maths_book_class_6.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46f56b8c-1110-4a1f-a46f-a7b9f98e39c5/samsung_galaxy_note_3_screen_replacement_price_in_nigeria.pdfIn PDF document text
    • http://kexemejalo.epizy.com/thank_you_god_for_giving_me_a_baby_boy_quotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e500d1c4-9f7e-461e-a2d3-60b90ad4962e/kenmore_elite_washer_and_dryer_accessories.pdfIn PDF document text
    • http://jogatitow.epizy.com/818449955.pdfIn PDF document text
    • http://xikisefux.epizy.com/kisuvopemowefodukazobib.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_off00013c1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C1C 5104 bytes
SHA-256: f5e8bb392eb663e7d06c10c45592083724cd1f0a5e9972aa1b1f0ff6ebed3dba
font_01_sfnt_off00014d8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D8A 11164 bytes
SHA-256: 97c127bf14012768a263e7cbc47d05600be4437f38f9e6c24d87fe5d3b958fbe