Malicious PDF — malware analysis report

Static analysis result for SHA-256 7806de082b2292ab…

MALICIOUS

PDF

72.9 KB Created: 2021-04-01 02:29:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2f5fd817d3cb4f3edce23c00cf921eda SHA-1: 71d0ff8e5ae9dee30f168b26d32c26804a1c70ad SHA-256: 7806de082b2292ab5901dbc4e4c9489af1943a58d307418242fd97c887d02253
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains multiple embedded URLs, one of which, https://xezojetit.ru/wix?keyword=worksheet+gas+stoichiometry, is flagged as an external URI. The document body, though heavily obfuscated, suggests a lure related to 'Worksheet gas stoichiometry'. The presence of embedded URLs and the nature of the detection indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://xezojetit.ru/wix?keyword=worksheet+gas+stoichiometry
    • http://instacopyrighthelpteam.com/21912567542lfxl3.pdf
    • http://shopbest.online/what_worldwide_events_happened_in_1900r5zk6.pdf
    • http://dusikazo.mypressonline.com/the_antinomian_controversy.pdf
    • http://moreprodukti.com/34239250158r2kgo.pdf
    • http://nefutekugurenap.mygamesonline.org/causes_of_environment_pollution.pdf
    • http://flowerport.shop/derwent_inktense_blocks_72_australiac4ndl.pdf
    • https://cdn.sqhk.co/tefulobesa/9ge9heQ/63228841197.pdf
    • https://cdn.sqhk.co/radofufalam/11thfSf/sushant_singh_rajput_songs_mashup_mp3_download.pdf
    • http://jodazok.22web.org/introduction_to_systematic_theology_louis_berkhof.pdf
    • http://tur8osale.site/bolimesuviregesosekek44xyc.pdf
    • https://cdn.sqhk.co/zamepeja/UichcIv/sajatozi.pdf
    • http://dugarudewemudo.sportsontheweb.net/23915051409.pdf
    • http://avit0.pro/xefudibapadk3ayh.pdf
    • https://cdn.sqhk.co/vobevufubito/CLaXvgd/mars_trine_mars_synastry_tumblr.pdf
    • http://carinsusa.info/spectrum_math_workbook_grade_8_free92cvz.pdf
    • https://cdn.sqhk.co/mowanideju/jbsgiqf/lipiratilinonuzufukat.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://bakilipos.epizy.com/badmash_company_songs_djmaza._com.pdf
    • http://wotawegij.rf.gd/49576047207.pdf
    • http://pofutujasex.rf.gd/sociological_theories_on_poverty.pdf
    • http://puvepedep.epizy.com/3753632818.pdf
    • http://kiganume.epizy.com/4279172125.pdf
    • http://bakilipos.epizy.com/30680480662.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_off0000e21d.bin
da728c4f9f430223b94a3f4d8b935a1042ca4360107379500cbc18c4297e5c5b
pdf-font-stream PDF embedded font (sfnt) at offset 0xE21D 5360 bytes
font_01_sfnt_off0000f445.bin
bfeb02015a31de80ebecae7718aab56d104175a1eea26f9d7a03e52b82cc5ae4
pdf-font-stream PDF embedded font (sfnt) at offset 0xF445 10036 bytes