Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac14ca029d788cc2…

MALICIOUS

PDF

85.2 KB Created: 2021-03-14 14:47:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a59bdb62469328aa804edc5f55a082a8 SHA-1: 516c54702b24f6617096c127138ad1f4286fdf51 SHA-256: ac14ca029d788cc2b584cf94556d9ee246d460fdb0db94806d9a82ffab9b0ea8
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain. Heuristics indicate the presence of external URIs and a high probability of maliciousness based on ML classification and ClamAV detection. The document body, though heavily obfuscated, suggests a lure related to software, likely intended to trick the user into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://golowaki.ru/123?utm_term=sql+server+2014+sp3+cu3
    • https://cdn.sqhk.co/dexediwiboze/kmBjh9e/worldcraft_premium_3d_build_craft_pc.pdf
    • https://cdn.sqhk.co/xolilipedeko/zgcmYak/science_journalism_jobs_near_me.pdf
    • http://dosaxixapaxa.medianewsonline.com/70361710150.pdf
    • https://cdn.sqhk.co/fuzekofuwe/cgcifgj/dojubefupezodajimo.pdf
    • http://zefujixa.mywebcommunity.org/12277239702.pdf
    • http://filuxunokenobud.mygamesonline.org/lamudosatapuf.pdf
    • https://cdn.sqhk.co/nedupugifuka/hbOYiaO/north_star_hebrew_meaning.pdf
    • https://cdn.sqhk.co/lasotepana/W3biigh/idle_mine_crusher.pdf
    • https://cdn.sqhk.co/saboxiwago/FBw5jgu/wutekotawadanusemazuk.pdf
    • https://cdn.sqhk.co/liripudeb/WCjzifc/93706507856.pdf
    • https://cdn.sqhk.co/nikofejujel/ggpZCAC/jutilakagozovasosubolak.pdf
    • https://cdn.sqhk.co/soxosovave/n6ghgjr/zabina.pdf
    • https://cdn.sqhk.co/xabovalizo/ayRTlIf/jadazukizujidasowala.pdf
    • https://cdn.sqhk.co/mozozezowos/jAieijo/mitorefan.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/960ee8cb-0d48-42d9-9dff-5ad0b328ff8c/54611347972.pdf
    • https://uploads.strikinglycdn.com/files/b1b08dc1-6b53-4602-92fe-6709bc93b35c/tom_sawyer_and_huckleberry_finn_2014_english_subtitles.pdf
    • https://uploads.strikinglycdn.com/files/2d49e6a4-7d9e-428c-a2f2-d1de598418c1/napoleon_hill_law_of_success.pdf
    • https://uploads.strikinglycdn.com/files/5d8a6af1-1cc4-4bc9-a54d-2da361ddeebf/tesalabotutanabitisagu.pdf
    • https://uploads.strikinglycdn.com/files/37be9cdf-661d-41d3-bf38-f2a64f26158b/python_remove_list_index_out_of_range.pdf
    • https://uploads.strikinglycdn.com/files/3e100f97-4cd0-426f-82d6-a2c873bd6c4f/matilda_sinhala_book.pdf
    • https://uploads.strikinglycdn.com/files/1a843e84-ed46-4dae-b6ac-d4918e52cc1e/xonadaxilunonozogawegixi.pdf
    • https://uploads.strikinglycdn.com/files/5687a48f-dc6d-45e8-a3b2-5f5534521bc9/dudutamabibi.pdf
    • https://uploads.strikinglycdn.com/files/b377af70-1ae0-4930-80ba-b9ec8bd677e2/body_for_life_diet_plan_vegetarian.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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000103e7.bin
5adf86b0d3099a2566418713edb6675dc866a02a11431ce7d85dc44e5c878dc6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103E7 5584 bytes
font_01_sfnt_off0001171c.bin
8fa92ecc17414794a3617e4ac4eae0993f1949703e423a26ad077eab7a880d43		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1171C 15088 bytes

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