Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ff774566c7fb1e3…

MALICIOUS

PDF

75.1 KB Created: 2021-04-06 11:48:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a59adc359f5f69bb6b78b8ce60192406 SHA-1: 65deeb014d206160f3526d5c9fd8df212d689933 SHA-256: 3ff774566c7fb1e3a55d257e275a92d2859cb045defb5a995b0d6f079bf40cb0
96 Risk Score

Malware Insights

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

This PDF document was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious URL, likely intended to redirect the user to a malicious site. The document body, though heavily obfuscated, suggests a lure related to a Netgear manual, indicating a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/strik?utm_term=netgear+prosafe+gs108tv2+manual
    • http://bumawusuka.mypressonline.com/50205146373.pdf
    • https://cdn.sqhk.co/guvawatuzax/jfichir/37539913662.pdf
    • https://cdn-cms.f-static.net/uploads/4452217/normal_606b2e0f26c96.pdf
    • https://cdn-cms.f-static.net/uploads/4421213/normal_605685c8134a3.pdf
    • http://sks-expertiza.ru/35084265438dymog.pdf
    • http://sovuradema.medianewsonline.com/fs_i6x_range.pdf
    • http://1xbet-sportstavki.fun/nuwuwetotiibp61.pdf
    • https://cdn-cms.f-static.net/uploads/4408004/normal_601107eb18ed9.pdf
    • http://rupiwot.getenjoyment.net/cadena_de_suministro_definicion.pdf
    • http://amsidisi.xyz/slope_intercept_form_calculator_soupbm4dj.pdf
    • http://specialsale.info/snappy_tomato_pizza_menu_alexandria_ky15q9s.pdf
    • https://cdn.sqhk.co/kelopifagisu/hayA1ih/pesaropikixiripa.pdf
    • https://cdn.sqhk.co/kisereta/SggljiP/genusezopulunusefugol.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/mosezavor/wafogumizekonatanujivaka.pdf
    • https://uploads.strikinglycdn.com/files/053005e8-3841-4a4a-b42e-a05d2374df09/nalepejigilosiv.pdf
    • https://uploads.strikinglycdn.com/files/1dd61403-72fc-42cc-9299-009cc8cd80be/28428206289.pdf
    • http://japinoxizidunub.myartsonline.com/chrome_adobe_flash_2021.pdf
    • https://s3.amazonaws.com/voxipanovigepiv/ctnet_user_guide.pdf
    • https://uploads.strikinglycdn.com/files/cd08f9c7-9dde-4530-b9c1-c1e79d562500/lopesexemumaw.pdf
    • https://s3.amazonaws.com/nuvukivaxiren/52666495634.pdf
    • https://s3.amazonaws.com/punagilelabon/bearish_doji_star_formation.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_off0000e728.bin
224070f1f61b2fc8f7088b1e7429682c442b76b60686c1e64831a302a1883244
pdf-font-stream PDF embedded font (sfnt) at offset 0xE728 5768 bytes
font_01_sfnt_off0000facb.bin
d16e450cc0c6d68146aff20ee8ae02ad11df45f0ec46962914bd35ef9b218a64
pdf-font-stream PDF embedded font (sfnt) at offset 0xFACB 10708 bytes