Malicious PDF — malware analysis report

Static analysis result for SHA-256 da4520a2086f3e68…

MALICIOUS

PDF

93.3 KB Created: 2021-07-22 07:55:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cfffd7686e08e06c72613856f7db653e SHA-1: 310505f51a516389f558b8f01a0deb02c04da3e7 SHA-256: da4520a2086f3e68ad1888fedfafd12ba374f709c6401ddd49db22934520cd6a
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of embedded URLs, though many are marked benign, suggests a potential phishing or redirection mechanism. The PDF structure and embedded content, despite being heavily obfuscated, are consistent with malware delivery. No scripts were extracted from this sample, limiting the ability to determine specific execution methods.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://feedproxy.google.com/~r/razvivatel/yapz/~3/gOBB6uaVNRA/square?utm_term=noble+intentions+meaning
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f0b859c08012782f7a3e67/1626388569222/business_administration_objective_for_resume.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ee3fd8796bb0196c61db4d/1626226649034/2nd_puc_accountancy_question_bank_solutions.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e79b3c97884458c99deeef/1625791292218/dolijusanoxupo.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e92caeb132fa362073e8ed/1625894062442/river_stage_of_vaal_river.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f539c71434f635473a5f33/1626683847289/jubufaxorukupenotise.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f42f4d9471b562af18fc50/1626615629198/28526363094.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f7ffb0896e5a6c1e3679da/1626865584394/koxodadu.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f4402e783e880aac88897e/1626619950565/73300885761.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f8acefaa10666fbee4f595/1626909936082/bedibiloxasadutixebadovo.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f8b6804feb5b1dad2c0167/1626912384762/duvovitux.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f8f223d35d04529b2c8d14/1626927651375/75053523542.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f523f09c7c9f0ea9afd739/1626678257001/messing_with_me_meaning.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e953d3f229ba2ea8387e0b/1625904083411/frittata_recipe_without_cast_iron_skillet.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f09c4c5e456749492f0839/1626381388945/44466127269.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f84521bd6002733ac9b499/1626883362006/drawing_with_compass.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f2b2811ad9bf1c32acd782/1626518145385/prepositional_phrases_list_and_meaning.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e94091aa30721e65f01ac5/1625899153802/fusitegotuxutorofexijova.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f0af5bff539159aa60b820/1626386267926/content_meaning_in_tamil.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ee54fdbb85ab7f02be7719/1626232061554/clash_of_clans_town_hall_9.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ee31af9c71001bedf514f7/1626223023797/nubiwemoladiloweleze.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f5687caba5f52989c198c4/1626695804849/93517189428.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e7ffcddbb92d34f5b01e4e/1625817038124/tafomapelofu.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f89b5c3515ea3202485773/1626905437101/constant_pain_in_urethra_male.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f613a6aaa83966771322cb/1626739622115/delisonukape.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010be5.bin
7611960995d28015d8c97cac12de2d130eb8f23a3d9c7e847f84e72e5465342b
pdf-font-stream PDF embedded font (sfnt) at offset 0x10BE5 16740 bytes
font_01_sfnt_off00013797.bin
a42893a06c013d38dbbe68773ca3c6822678960698ac9d87e8bd4cb86c1ee3a2
pdf-font-stream PDF embedded font (sfnt) at offset 0x13797 10468 bytes
font_02_sfnt_off00014f5d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14F5D 16792 bytes