Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf9f5836ab8ec7ce…

MALICIOUS

PDF

74.4 KB Created: 2021-04-05 05:43:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e600e150d26384530f11dbd64504905d SHA-1: d96de6d22708fe410911849cd3f895c03ed846e9 SHA-256: bf9f5836ab8ec7ceaab696d98d23683430ef81f815062a602a9a32f8d6efef4f
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a URL that appears to be a lure for downloading software, indicated by the 'poweramp apk full version 2020' keyword in the URL. While no scripts were directly extracted, the presence of external URIs and the nature of the detection suggest the document is designed to trick users into downloading a payload.

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://golowaki.ru/wix?keyword=poweramp+apk+full+version+2020
    • https://cdn.sqhk.co/logulemuset/cDlhiih/dr._dave_charleston_wv.pdf
    • http://robugipunebib.mygamesonline.org/fabejubelakefevilunowusob.pdf
    • http://ketrovk.xyz/is_kundli_matching_necessary_for_love_marriagejmli7.pdf
    • http://gradstroy.su/natural_acrylic_nails_shortbq1io.pdf
    • http://meetsol.xyz/what_is_motivation_sports_psychology5683t.pdf
    • http://mybiol.site/likufapafasitu1mwi3.pdf
    • http://cpskras.website/pharmacology_drug_classification_liszkdab.pdf
    • http://table-wait.com/ex_888_casinoc1wox.pdf
    • http://tublitalia.fun/sozozozume99nya.pdf
    • http://sitebomobegux.sportsontheweb.net/g_shock_ga_100_lg.pdf
    • http://werojati.getenjoyment.net/approach_to_hyponatremia.pdf
    • http://storezone.info/86946642321kebb4.pdf
    • https://cdn.sqhk.co/wedowetaso/fgihaDB/free_visiting_card_maker_app.pdf
    • https://cdn.sqhk.co/vopupevomate/a7GfowQ/79532151145.pdf
    • http://artemk.ru/monster_truck_show_melbourne_2020ijxtu.pdf
    • http://ca-manalapan.space/754489451125vyz1.pdf
    • https://cdn.sqhk.co/nogegamapagi/gghghgy/kajaverigisoxen.pdf
    • http://erethiztzj.space/clovis_roi_des_francs_cm1hgpa4.pdf
    • http://pusovemolexed.scienceontheweb.net/rewuzob.pdf
    • http://carinsusa.info/spectrum_math_workbook_grade_8_free92cvz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://ligekasuxube.onlinewebshop.net/wakavobixolutubixufoweraf.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db1c.bin
b78fc2e259fc177edafd04d6d672e484604a534a0efc76f8a44a4cf2477b1013
pdf-font-stream PDF embedded font (sfnt) at offset 0xDB1C 5340 bytes
font_01_sfnt_off0000ed3a.bin
f3972d44dbd639829d18853f96ee39a69f2b4ddbbd3555dcd9a7a1172b2c1960
pdf-font-stream PDF embedded font (sfnt) at offset 0xED3A 9700 bytes
font_02_sfnt_off00010e61.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x10E61 4324 bytes