Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc0dbadbfeb8ea1d…

MALICIOUS

PDF

82.4 KB Created: 2021-03-13 18:59:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 434df13dea836c5ceacafee8ff325b5c SHA-1: 44b2bb735dcdf1519fa58ef4dd3c61ba25365749 SHA-256: dc0dbadbfeb8ea1dafda5a94ac91cf90fcb8fc7e8e6358172cb09ec4ec25e10f
196 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains numerous external links, including one to 'lnstagram-support.live', suggesting a lure to a malicious site. The document body, though partially corrupted, appears to be a fabricated list of medications, a common social engineering tactic to entice users to click on malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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/award?keyword=listado+de+medicamentos+y+para+que+sirven+pdf
    • https://cdn.sqhk.co/salejejo/cgjHJjh/lubukek.pdf
    • https://cdn.sqhk.co/kogewole/7Zrij7V/crewmate_or_imposter_quiz.pdf
    • http://lnstagram-support.live/72801451731aqi88.pdf
    • https://cdn.sqhk.co/tuforalogidu/hghgjgd/green_bubble_iphone_meme.pdf
    • http://3203epworthcres.com/didisexazoworugopaneb541v.pdf
    • https://cdn.sqhk.co/konanetufuda/ejjjhqb/wetofigakulirej.pdf
    • https://cdn.sqhk.co/foropogajag/gKbVjMX/4k_video_live_wallpaper_download.pdf
    • http://vseti.life/nexus_mod_manager_premium_crackwnvnk.pdf
    • http://instapriz.online/bunitapuzufwh4v.pdf
    • https://cdn.sqhk.co/xufatirumina/7uz93jc/rhythm_city_18_september_2020_full_episode.pdf
    • https://cdn.sqhk.co/nebemina/mawhiji/ropapose.pdf
    • http://sberpodarok2020.online/how_to_bake_on_a_weber_gas_grill6owox.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/e70f93d3-3ce1-44ce-b473-dd571346a50b/86949594815.pdf
    • https://uploads.strikinglycdn.com/files/8c41c808-dd89-41b3-8fe7-b624a2841a91/data_structures_and_algorithms_in_python_wiley.pdf
    • https://uploads.strikinglycdn.com/files/4fe5e227-6467-449d-85b8-689f232563a2/86869160468.pdf
    • https://11627308-8c8f-4f08-99ed-0ad85160907d.filesusr.com/ugd/682d1c_93346d57075349ef9b96cb2aa3eded4c.pdf?index=true
    • https://uploads.strikinglycdn.com/files/07df4443-8cc4-469a-89e9-8a2b3a250d80/wi_state_constitution.pdf
    • https://12f7643e-9106-4823-89c2-0bdaecd1bc22.filesusr.com/ugd/1f6d71_ac48ca28b6e547d2bef75a0c2e177742.pdf?index=true
    • https://uploads.strikinglycdn.com/files/91700653-5b53-4940-bd8d-fadbe236a0ac/91019708934.pdf
    • https://bbf05351-1c49-455c-8ea8-df349977a4d5.filesusr.com/ugd/15c6d6_7e3989f37c7d47999d62a5ef5da25dda.pdf?index=true
    • https://uploads.strikinglycdn.com/files/fbb06fa3-8372-4081-b936-71982a6e7987/dimegazikoki.pdf
    • https://8e0cabef-d481-4215-b437-8a5fc4e4723c.filesusr.com/ugd/f41140_8f05b35c19d049189f1a6a1748c7a3e8.pdf?index=true
    • https://uploads.strikinglycdn.com/files/4568208f-d6b0-456b-b780-3aae6f34f792/wunakubexuxini.pdf
    • https://uploads.strikinglycdn.com/files/2923c446-e62b-4b15-9697-b907ce3d02b2/barrons_math_level_2_12th_edition.pdf
    • https://54d25d35-1219-4e5f-97c3-905e72ea606f.filesusr.com/ugd/6d59ab_8eced3aba72c4d45840d862a5e84e3ab.pdf?index=true
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f503.bin
5c9639eb9dcace98bd258e0fe71af3f135117962f246790041234575c1ed942b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF503 5380 bytes
font_01_sfnt_off0001073c.bin
290d8a24cb2608846f44fb7e1f12c0fb065d51e27acedc46bf2e64ce1530d745		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1073C 11308 bytes
font_02_sfnt_off00012bdf.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12BDF 4324 bytes

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