Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5affe19bef2c6e1…

MALICIOUS

PDF

88.2 KB Created: 2021-04-19 10:28:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d1813f46a731aa9ca7773a7b268af671 SHA-1: a1a609627770c6bbb5500bbaf98335d41b91cfe1 SHA-256: b5affe19bef2c6e15a50594fffd3cacedd5799d965e763e4221926034401c7ec
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, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a URL that is likely part of a phishing or malware distribution campaign. The document body, though heavily obfuscated, suggests a lure related to academic or informational content, which is a common tactic for phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://xezojetit.ru/strik?utm_term=in+what+ways+were+the+civilizations+of+mesopotamia+and+egypt+alike
    • https://cdn.sqhk.co/xepubijiko/viajaqV/jofoni.pdf
    • https://cdn.sqhk.co/kinanekoxo/ihjZicb/device_help_services_app.pdf
    • http://xubajur.mygamesonline.org/68174943409.pdf
    • http://nokasosozigof.mypressonline.com/uvu_training_guide_free.pdf
    • https://moturepuka.weebly.com/uploads/1/3/1/8/131871952/8724591.pdf
    • https://daxogane.weebly.com/uploads/1/3/2/8/132815110/1940019.pdf
    • https://cdn.sqhk.co/zerurukoraju/hejbjgv/dawabizubesipuga.pdf
    • http://tadosuzewamu.medianewsonline.com/pofufivisibule.pdf
    • http://zakewabo.scienceontheweb.net/xovoruga.pdf
    • https://cdn.sqhk.co/puzukebejas/jgdHhcN/82631693647.pdf
    • https://nowigusoludi.weebly.com/uploads/1/3/4/2/134266380/4346228.pdf
    • https://cdn.sqhk.co/judawube/KGjf2jj/46774383955.pdf
    • https://cdn.sqhk.co/lomokubaf/4vcQFjg/47045952967.pdf
    • https://cdn.sqhk.co/puxolika/gigjFoO/dutodez.pdf
    • http://fovikoxesaweziz.medianewsonline.com/how_much_time_to_learn_matlab.pdf
    • https://vunorozixu.weebly.com/uploads/1/3/1/1/131163876/433617.pdf
    • http://tuduvodakep.mypressonline.com/kuraxasorofoliwu.pdf
    • http://fidenenaxemol.iblogger.org/apollo_twin_mk2_solo_review.pdf
    • http://lomidal.mygamesonline.org/makkar_ielts_speaking_jan_to_april_2020_download.pdf
    • http://xepewifub.mygamesonline.org/95042084099.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://vezexosewomex.epizy.com/25894498658.pdf
    • http://ranemojak.epizy.com/77249349167.pdf
    • http://mimubokufalow.rf.gd/british_council_ielts_reading_test.pdf
    • http://matewedidoxeber.onlinewebshop.net/beethoven_sonata_no._30_in_e_major_op._109.pdf
    • http://xenamufilas.rf.gd/artificer_dnd_5e.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_off00011994.bin
cca05a26251af5a199c1208d3a80bd036446fa07cb4185c2c13420f2673076c8
pdf-font-stream PDF embedded font (sfnt) at offset 0x11994 5876 bytes
font_01_sfnt_off00012d98.bin
f4f80d8f8c286f10ddeb316ff54e3eaf7f06fb74ad02f14856c921a42fc01b7f
pdf-font-stream PDF embedded font (sfnt) at offset 0x12D98 10920 bytes