Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e7b0f25e12170eb…

MALICIOUS

PDF

73.7 KB Created: 2021-02-16 18:52:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: ee9b20d96129a792122d8761a6477bf5 SHA-1: 1a5acfd468754c3cac6da65a1fc4ccb978890c5a SHA-256: 9e7b0f25e12170eb868c2713254131d252e7af4ce2843d8d99332d2c3087b8b8
96 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with a high risk score. It contains an embedded URI pointing to 'baarspo.ru', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to 'Head first android development'. No scripts were extracted, but the PDF structure and embedded URI are strong indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/strik?utm_term=head+first+android+development+a+brain-friendly+guide+3rd+edition PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4422631/normal_5fe54d83c2a11.pdfIn PDF document text
    • https://cdn.sqhk.co/belexewuwif/hddnjhf/rally_racer_3d_drift_extreme_racing_game.pdfIn PDF document text
    • https://cdn.sqhk.co/kefekawit/oyjcgjz/revenge_of_warriors_hack_money.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387052/normal_5fe5a0c4c9432.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://buxuzob.epizy.com/hris_analyst_interview_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/foneniz/free_dd_campaigns_reddit.pdfIn PDF document text
    • http://puviwozizasi.rf.gd/48583323864.pdfIn PDF document text
    • https://s3.amazonaws.com/lurutopobi/lasusutujuk.pdfIn PDF document text
    • http://dixasimoxipux.rf.gd/73369787784.pdfIn PDF document text
    • http://zafotuzovis.epizy.com/identifying_place_value_worksheets_for_grade_2.pdfIn PDF document text
    • https://s3.amazonaws.com/kezemiradigu/hangout_free_for_android_mobile.pdfIn PDF document text
    • http://vejebuta.rf.gd/skf_bearing_calculator_android.pdfIn PDF document text
    • http://pinezininefos.epizy.com/dedub.pdfIn PDF document text
    • http://pareruwawetis.rf.gd/monster_stay_with_me_masked_singer_performance.pdfIn PDF document text
    • https://s3.amazonaws.com/mekonulegipero/anarkali_2015_video_song.pdfIn PDF document text
    • http://bozudob.epizy.com/duvefebimebavuruz.pdfIn PDF document text
    • https://s3.amazonaws.com/kizugokofo/thevar_cut_song_video.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0EB 5820 bytes
SHA-256: b540ee79042ffc5fcef94cc7518ed8dd581520a04fa4fd263a97038cdfc3c416
font_01_sfnt_off0000f4bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4BF 10488 bytes
SHA-256: aa31ef67574eb87a0ee29f18498d78962e556167081548dfd6be445b45c9b226

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