Malicious PDF — malware analysis report

Static analysis result for SHA-256 a02ab948f6c47227…

MALICIOUS

PDF

78.5 KB Created: 2021-03-26 06:03:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 56d43f14cb231d2d2ca31e3223b73a1b SHA-1: 761c88121e99f3b08dcd391295e305ea5377df61 SHA-256: a02ab948f6c4722741774287582ce38bc7afc20b9dc532839d502e66b30818cd
96 Risk Score

Malware Insights

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

The PDF contains an external URI pointing to a suspicious domain, and ClamAV detected it as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to 'military cac reader for android'. The presence of embedded URLs and the ML classifier's high confidence score indicate malicious intent, likely to redirect users to further malicious content or downloads.

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://dafemum.ru/123?utm_term=military+cac+reader+for+android
    • https://befapoge.weebly.com/uploads/1/3/1/6/131637854/56cd33963abeea.pdf
    • https://wazefiwef.weebly.com/uploads/1/3/4/3/134369298/7543294.pdf
    • https://cdn-cms.f-static.net/uploads/4369909/normal_604aec9bf1169.pdf
    • https://cdn-cms.f-static.net/uploads/4454813/normal_60590fc83a5e8.pdf
    • http://lazotub.mywebcommunity.org/mapifupuropax.pdf
    • https://cdn-cms.f-static.net/uploads/4418590/normal_602760d3aaeba.pdf
    • http://zuduwamani.mypressonline.com/jorenoresuva.pdf
    • https://static.s123-cdn-static.com/uploads/4403140/normal_6001eda2303d8.pdf
    • https://cdn.sqhk.co/nizivatitogu/ih9GTww/89858291632.pdf
    • https://suxifobafip.weebly.com/uploads/1/3/4/3/134370270/8263ea.pdf
    • https://cdn-cms.f-static.net/uploads/4378834/normal_60217d30cdc8b.pdf
    • http://viniveba.mywebcommunity.org/xeludixosaroxanora.pdf
    • https://wugupuvexiso.weebly.com/uploads/1/3/0/9/130969254/43118.pdf
    • https://cdn.sqhk.co/bovutolomevo/hgfqUia/tournament_approach_definition.pdf
    • http://xefawojuj.mygamesonline.org/73236204413.pdf
    • https://mejotozoferu.weebly.com/uploads/1/3/4/8/134866749/kopal.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://dufojamimusim.atwebpages.com/ascii_code_table_download.pdf
    • https://uploads.strikinglycdn.com/files/8fd76961-3d7a-4da8-a657-a81c7f45522d/bexapeximebebajidiwimuz.pdf
    • https://uploads.strikinglycdn.com/files/0cadadda-b22f-496a-96e6-3ec9c78ee69f/why_is_my_tumble_dryer_leaking_water_from_underneath.pdf
    • https://uploads.strikinglycdn.com/files/0ec935f2-cbb5-4acb-b03b-f5716007e6f6/sad_love_story_movies_on_netflix.pdf
    • https://uploads.strikinglycdn.com/files/96b70db5-888d-4a27-8a3e-af3583c9b054/bandit_mp3_download_paw.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_off0000f36a.bin
285c7ba68ad1d8ffdce4bf27762a0e0830e0e1ced4545225d60fd0be17001738
pdf-font-stream PDF embedded font (sfnt) at offset 0xF36A 4944 bytes
font_01_sfnt_off00010460.bin
78d09df40a0861f07bedaf3c0846680996ace00f47e09f2061ddd22cc4d596e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10460 12276 bytes