Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1c1a6705598e6a0…

MALICIOUS

PDF

94.7 KB Created: 2021-03-21 10:29:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: deb408854d73086a302474cbf68ff9a1 SHA-1: d34acd5474fb9bfa35e688b3eeb68f483b3923aa SHA-256: c1c1a6705598e6a023edf67ce87fb93d4d8012bae3f610f350ebc6c7adffd964
96 Risk Score

Malware Insights

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

The PDF contains an external URI pointing to a URL that appears to be a lure for downloading further malicious content, disguised as educational material. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the presence of embedded URLs and the nature of the PDF heuristics suggest it's designed to facilitate the download of a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://ponafet.ru/wix?keyword=american+government+powerpoints+for+high+school
    • http://lutekorudafu.iblogger.org/7187408136.pdf
    • http://majovevalaji.sportsontheweb.net/xosojurijozez.pdf
    • http://amin-ukraine.net/31513979464o3i59.pdf
    • http://vvd.bar/how_to_connect_hype_bluetooth_earbudswju35.pdf
    • http://yourcy.com/5075501632102klo.pdf
    • https://cdn.sqhk.co/zonurubo/jKcjijg/bluetooth_android_4._2.pdf
    • http://usesoda.pro/utorrent_free_apk_androidwfqiw.pdf
    • https://cdn.sqhk.co/pevelefotuve/dI1nSih/renepimedi.pdf
    • http://tryplafond.xyz/how_to_use_alphatrak_2_lancets3bgz3.pdf
    • https://cdn.sqhk.co/libigekukaru/jag0gjR/18156415756.pdf
    • http://optarfes.com/adverbial_phrases_ks2_sats828cc.pdf
    • http://barbanapoli.moscow/craftsman_circular_saw_19.2_volt_battery47gdo.pdf
    • http://help-copyrighteamservice.com/57008368946rqt33.pdf
    • https://cdn.sqhk.co/gojogefe/hbjeha7/dope_wallpaper_hd_iphone.pdf
    • http://price-list.moscow/how_to_see_live_video_of_earth_from_satellitezwpfg.pdf
    • http://santecmb-sarl.com/tevikisewadutizechdwl.pdf
    • https://cdn.sqhk.co/fujotojaxob/bjtXStm/ragdoll_fall_apk.pdf
    • http://govakokes.22web.org/backstage_pass_template_free.pdf
    • http://zeboxagekej.sportsontheweb.net/xugodiwoxatuluwuwalus.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://diwedixeku.rf.gd/kutijakuraxajikudeveduf.pdf
    • http://gebejofokim.rf.gd/rakivajexane.pdf
    • http://pozidijapepore.atwebpages.com/71862460962.pdf
    • http://dolanuvusipegu.myartsonline.com/2020_audi_q5_owners_manual.pdf
    • http://noratev.myartsonline.com/safety_insurance_glass_claims_phone_number.pdf
    • http://nakedavip.epizy.com/morfologi_catharanthus_roseus.pdf
    • http://bixuxopot.epizy.com/xamopidoripetam.pdf
    • http://dafemekadur.epizy.com/ankush_songs_free.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_off00012647.bin
07cdc55e1632b2c6e68e4ffad57b2731b64d19ac1c803126d8f3a220867bd174		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12647 5360 bytes
font_01_sfnt_off0001385b.bin
1311c7cca32bfe7990daca97b801f9a831234eadcc0a274093b797ae807fdc8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1385B 11512 bytes
font_02_sfnt_off00015e5e.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15E5E 4324 bytes

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