Malicious PDF — malware analysis report

Static analysis result for SHA-256 9837c0a7ae815fad…

MALICIOUS

PDF

80.7 KB Created: 2021-03-20 08:28:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8e16453e19e5a76d27ed369f9ecdcb9b SHA-1: 7755f017aba758513f5ac7fcdc496f94189d2eaa SHA-256: 9837c0a7ae815fad2d7761bcc7413daf23d1504b74507a2bff2473a002f72b89
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, identified by heuristics and ClamAV as malicious. The document body, though heavily obfuscated, suggests a lure related to a 'webquest answers' topic, likely intended to trick users into visiting the malicious URL. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://ponafet.ru/wix?keyword=cell+cycle+and+mitosis+webquest+answers
    • https://cdn.sqhk.co/menidume/ktaIpdj/gelizasuxaluzodagow.pdf
    • https://cdn.sqhk.co/lenubire/hdijqgg/xegagipazafitazamaz.pdf
    • https://cdn.sqhk.co/mozejipakas/hNgchcw/xakanamalitupokoketifofu.pdf
    • https://cdn-cms.f-static.net/uploads/4468294/normal_6031e02d0a02d.pdf
    • https://cdn.sqhk.co/firavibaw/atbRS9c/fatasekuderuvibolelipusi.pdf
    • http://nososunovurosag.iblogger.org/pukalezabefewuzo.pdf
    • https://cdn.sqhk.co/bozajapema/ATg1dhc/runevugesusugimilepone.pdf
    • https://cdn-cms.f-static.net/uploads/4374843/normal_6025564704840.pdf
    • https://cdn-cms.f-static.net/uploads/4481156/normal_604b053031392.pdf
    • https://cdn.sqhk.co/bijilixiger/gdYvxid/gozav.pdf
    • https://static.s123-cdn-static.com/uploads/4382190/normal_5fc5f53adc3d8.pdf
    • https://cdn.sqhk.co/levowexesu/phi6Yic/velodrome_track_day.pdf
    • https://cdn.sqhk.co/texafikogot/hemifgt/wallet_of_satoshi.pdf
    • https://cdn.sqhk.co/xixujipum/1Btidib/car_hill_racing_mod.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/b5fe11c3-9045-4a2f-9b3d-dbacd9ee32d1/20277153254.pdf
    • https://uploads.strikinglycdn.com/files/3d85d6b1-5047-4694-9d20-0ea0d390926c/94745951009.pdf
    • https://uploads.strikinglycdn.com/files/67807b5f-bba7-4710-8212-92aaa7586330/bella_12_cup_programmable_coffee_maker_instructions.pdf
    • http://zebasera.rf.gd/trust_deed_format_in_english.pdf
    • http://jifupupuf.epizy.com/cartesian_spherical_and_cylindrical_coordinates.pdf
    • https://s3.amazonaws.com/gidibesuxi/pilujiw.pdf
    • https://uploads.strikinglycdn.com/files/94aea594-0da1-443f-ab96-2b333285e072/how_to_wind_a_bobbin_on_a_kenmore_ultra_stitch_12.pdf
    • http://jariluwalube.epizy.com/43878097695.pdf
    • https://s3.amazonaws.com/dipafuxe/8951876550.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_off0000fc62.bin
f8c539cf29021c1df88380802bcea1a93afe8c4a8266433b504dfba1793dadda
pdf-font-stream PDF embedded font (sfnt) at offset 0xFC62 5452 bytes
font_01_sfnt_off00010ee1.bin
c4eeccf5fc89a269ca252a535d346470cbd5fec05c87fa22815cfa06641f18a7
pdf-font-stream PDF embedded font (sfnt) at offset 0x10EE1 11352 bytes