Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc175078c3a1f690…

MALICIOUS

PDF

74.8 KB Created: 2021-03-29 04:36:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 55d04d0de76b0cdf21d1a62f5e075414 SHA-1: 19096745b8719ed6501554b36b8ff98eae769ab2 SHA-256: bc175078c3a1f690c02fe38294419b847cc69a3836a732f43d1481cd76b9d535
96 Risk Score

Malware Insights

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

The file is a PDF document detected as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to medical codes, which is a common tactic for phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://kuzutuzo.ru/strik?utm_term=icd+9+code+for+wound+infection+unspecified
    • https://cdn.sqhk.co/wufaluvete/3hbbicr/sputnik_movie_2020_review.pdf
    • http://zhigina.ru/67197875492vt81q.pdf
    • http://jetavof.sportsontheweb.net/mechanical_drawing_symbols_chart.pdf
    • https://xonokuraku.weebly.com/uploads/1/3/3/9/133988937/c9fd9f1408ff437.pdf
    • http://fizebiredasibi.mypressonline.com/what_happened_to_mary_rowlandson.pdf
    • https://cdn.sqhk.co/tononapiwaso/gbehKfF/top_races_at_darlington.pdf
    • https://static.s123-cdn-static.com/uploads/4403805/normal_5fcb6ac3da50d.pdf
    • https://gilanevevo.weebly.com/uploads/1/3/0/7/130739192/jiwiwatulebobobo.pdf
    • http://springtea.space/hp_smart_printerl5dl6.pdf
    • https://cdn.sqhk.co/famagafe/dggVJYZ/race_for_the_galaxy_gathering_storm_rules.pdf
    • http://lamatokatov.22web.org/the_curious_baby_elephant_questions_and_answers.pdf
    • http://paganel.world/1549664479461vnb.pdf
    • http://mirror-x.org/pududujulcsjn2.pdf
    • http://wajuxerisowo.iblogger.org/jexoxozaganasazupeped.pdf
    • http://kudukudimox.sportsontheweb.net/60667767445.pdf
    • https://cdn-cms.f-static.net/uploads/4392463/normal_601c03f385b46.pdf
    • https://cdn.sqhk.co/zapiferufefu/omif7HV/vipofuvilitojixof.pdf
    • https://cdn.sqhk.co/wefenosefob/iigjja2/jarukutowodejono.pdf
    • https://cdn-cms.f-static.net/uploads/4367297/normal_604ed47b96d09.pdf
    • https://static.s123-cdn-static.com/uploads/4393348/normal_5fe526a2b60fe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://susejukeb.epizy.com/4352873022.pdf
    • http://jabelakejirer.epizy.com/ground_floor_plan_of_theatre_listening_answers.pdf
    • http://kimafixenij.epizy.com/how_to_connect_canon_printer_to_computer_using_wifi.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_off0000e928.bin
e986be545d213a572de1225b0a88fe4cf600bfb65a1db3aac28f138cd46608b5
pdf-font-stream PDF embedded font (sfnt) at offset 0xE928 5092 bytes
font_01_sfnt_off0000faa4.bin
fbf8da51383e2eb729bda2ab76b7372169b85d69ec2fd5a1dc2caedcda7985e8
pdf-font-stream PDF embedded font (sfnt) at offset 0xFAA4 10056 bytes