Malicious PDF — malware analysis report

Static analysis result for SHA-256 698da66846579e79…

MALICIOUS

PDF

81.7 KB Created: 2021-03-31 22:27:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4178491fdf98db5084868111062daa26 SHA-1: 2eb159a85247567ab5d030c337dd54bcd48171e9 SHA-256: 698da66846579e799d3c165a496db9ffd23951a702d9dca02e0b74fab513cd8e
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document that contains an embedded URL and is flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, suggests a lure related to resume forms. The presence of multiple unknown URLs indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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/123?utm_term=functional+style+resume+blank+forms
    • http://dmdmassage.com/749851738564z4aq.pdf
    • https://static.s123-cdn-static.com/uploads/4423454/normal_5ff4b4a22a60a.pdf
    • http://submonster.xyz/19267319638o983.pdf
    • https://cdn-cms.f-static.net/uploads/4378845/normal_602f70be0f977.pdf
    • http://instapriz365.site/84262130793dtq9y.pdf
    • https://cdn-cms.f-static.net/uploads/4365600/normal_6037fe49caf24.pdf
    • https://static.s123-cdn-static.com/uploads/4455894/normal_5fdd659512001.pdf
    • https://static.s123-cdn-static.com/uploads/4480898/normal_5ff1ae1e06fc1.pdf
    • https://cdn-cms.f-static.net/uploads/4426814/normal_5fdc543950853.pdf
    • https://cdn-cms.f-static.net/uploads/4501360/normal_604a54ef539c6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/8189b22c-c89e-4794-b945-be43e5f7b721/linking_phrases_for_essays.pdf
    • https://s3.amazonaws.com/bisegilupuf/81930524374.pdf
    • https://uploads.strikinglycdn.com/files/5ed3c9ec-95b1-4ff8-97ef-4429aad9b9f6/70915651395.pdf
    • https://s3.amazonaws.com/resixexi/deadly_switch_netflix_parents_guide.pdf
    • https://uploads.strikinglycdn.com/files/70dd69f2-ea4a-4343-bb38-9c791cbe1fe9/17075239313.pdf
    • https://s3.amazonaws.com/wuwabobujasivor/61483350831.pdf
    • https://uploads.strikinglycdn.com/files/d1bd5ce4-2de5-48f5-bde7-32be689c78ba/google_sketchup_2016_free_download_64_bit_with_crack.pdf
    • https://s3.amazonaws.com/tinezedu/93874748036.pdf
    • https://s3.amazonaws.com/tugumeb/gulevuwinefit.pdf
    • https://s3.amazonaws.com/zozuxukoxo/creative_brief_form.pdf
    • https://uploads.strikinglycdn.com/files/00880e02-94cc-4721-b1a1-d09801e21837/pafomuzik.pdf
    • https://s3.amazonaws.com/kisagoz/cdip_exam_preparation.pdf
    • https://s3.amazonaws.com/dikobepibelun/67934385232.pdf
    • https://s3.amazonaws.com/jupudizadid/where_is_the_wave_painting_located.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_off0000fe66.bin
5aee2a4630676ba4e18daf3a50739f20f75f7edd0594d9d70da6fda9a4ab808b
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE66 5288 bytes
font_01_sfnt_off0001105c.bin
6875339fe96a2bd5282150a8cd58211359ec624fac7985a6bacff9dda177fe2d
pdf-font-stream PDF embedded font (sfnt) at offset 0x1105C 12000 bytes