Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fd3f4622fa7198c…

MALICIOUS

PDF

89.1 KB Created: 2021-03-10 21:18:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 2ccc31629fe8825a1438e9d1d3bcda08 SHA-1: e9483e85f87171bb8bc72d2c65b53a1be26eda0e SHA-256: 7fd3f4622fa7198ce26518edd850ef2ece63e06da63fc164cc38093cbcba658a
126 Risk Score

Malware Insights

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

The PDF contains numerous external URLs, many hosted on disposable domains, and is flagged as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. Although no scripts were extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://jottigo.ru/strik?utm_term=how+to+test+for+carbonyl+group PDF link annotation
    • https://cdn.sqhk.co/zatejurix/gcAlCax/wewexiboxikuxejupevufo.pdfIn PDF document text
    • https://cdn.sqhk.co/fowipovoji/ieTuoAb/58052935710.pdfIn PDF document text
    • https://cdn.sqhk.co/lotuwuzu/jj4PdbN/kuganamugixasamujedodomap.pdfIn PDF document text
    • http://se-mrush.com/munamovelus482p.pdfIn PDF document text
    • http://xosuvirakogaf.iblogger.org/android_action_bar_text_color_xml.pdfIn PDF document text
    • http://smartbright.club/guwasezolobupuravecg2t1.pdfIn PDF document text
    • http://tiktoktop.design/pulifurinb8za.pdfIn PDF document text
    • http://aicberg.net/how_does_the_social_learning_theory_explain_domestic_violenceb9vf2.pdfIn PDF document text
    • https://cdn.sqhk.co/dotifonuvuwi/fR3hahf/10207186056.pdfIn PDF document text
    • https://cdn.sqhk.co/zisujidixa/gjjagjh/free_online_casino_slots_real_money.pdfIn PDF document text
    • http://mevatupumave.22web.org/16061305011.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/8e1faf8f-9494-4a62-9ae6-3df7b03b66c9/perepanolizekapaxuvobiw.pdfIn PDF document text
    • https://s3.amazonaws.com/resixexi/plant_tropisms_color_by_number_answers_key.pdfIn PDF document text
    • https://s3.amazonaws.com/wunojipu/south_african_animals_pictures_and_names.pdfIn PDF document text
    • http://gobumakibe.epizy.com/porsche_panamera_owners_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/kofabube/wordly_wise_3000_book_6_lesson_9a_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/vitelitubovuluj/70548717140.pdfIn PDF document text
    • http://fevufubot.rf.gd/soundcloud_android_app_offline.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cce89929-b30a-477b-a2fe-cd3d7561d774/cateye_astrale_8_instructions.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF14 6492 bytes
SHA-256: b9c1bd2281f23f09d905494077011cda678d8ff8a20e62f41a46584ce81a564d
font_01_sfnt_off00010f49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F49 5312 bytes
SHA-256: d306fc5deb037148e63f97ca1fd87c22c030a5d6eae519fca82dbef4500d8f46
font_02_sfnt_off0001217e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1217E 11408 bytes
SHA-256: 5ea6ec1d09bcd0d5e59ad043d65c7ea26acf7a227a15d5f6b03a4b1425738337
font_03_sfnt_off00014883.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14883 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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