Malicious PDF — malware analysis report

Static analysis result for SHA-256 74ae33e930352a04…

MALICIOUS

PDF

124.0 KB Created: 2021-05-09 20:02:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 5623bb6fba22e75dc9fe5dbfd6a7b20e SHA-1: 59b1e1f54bebeb91c7f9c752ca91c42450ac54d8 SHA-256: 74ae33e930352a04e96227599a61ab19b2d6278603836c3126d09a720e432d07
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://jumiwimov.ru/strik?utm_term=quran+with+tamil+translation+buy+online PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4486751/normal_606c99549e4c2.pdfIn PDF document text
    • http://sk-anker.ru/dibotodawosalustj5re.pdfIn PDF document text
    • http://olymp-trade.top/10280956877m1g73.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366978/normal_6033ee9e8ecfc.pdfIn PDF document text
    • http://nicepics.xyz/real_motorcycles_costov4at.pdfIn PDF document text
    • http://fexevewuli.mypressonline.com/fuxodojejenetiduvuwutim.pdfIn PDF document text
    • http://fukerijinexin.mygamesonline.org/electrical_engineering_degree_ranking.pdfIn PDF document text
    • http://b4shop.icu/barry_white_greatest_hitsiwug5.pdfIn PDF document text
    • https://cdn.sqhk.co/wesebewoweva/xhhxrut/59342246423.pdfIn PDF document text
    • http://keto-s1.com/vineland_adaptive_behavior_scales_score_interpretation7m0b9.pdfIn PDF document text
    • http://zunuruxeguxifi.mygamesonline.org/cp_plus_camera_price_list.pdfIn PDF document text
    • http://wumiwuzigimo.mywebcommunity.org/5470929421.pdfIn PDF document text
    • http://lejidakoxinetog.mywebcommunity.org/tixavozar.pdfIn PDF document text
    • http://takipleskazan.org/54149964810vjhid.pdfIn PDF document text
    • https://cdn.sqhk.co/gosuzufus/d8IaPie/sefuwonibesuraxamipogamu.pdfIn PDF document text
    • https://cdn.sqhk.co/lazimafuxuxi/3H3fjco/medamuwusajed.pdfIn PDF document text
    • http://bipowilago.mywebcommunity.org/bedenkenanmeldung_vob.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444657/normal_6000404299b8b.pdfIn PDF document text
    • http://shop-kid-toys.online/toastmaster_table_topics_contesti0iqk.pdfIn PDF document text
    • https://cdn.sqhk.co/jifedibodo/84pljcB/dream_girl_movie_rdxhd.pdfIn PDF document text
    • http://kugewezebuvigiw.mygamesonline.org/2003_honda_accord_door_parts_diagram.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.indictrans.orgIn PDF document text
    • http://zutaturusix.myartsonline.com/statistical_learning_model_using_r.pdfIn PDF document text
    • http://ferodibev.onlinewebshop.net/rulosakidafezapupojekuti.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0001bb45.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1BB45 21700 bytes
SHA-256: 745a9989a5a24baa566e19050032827acf005514d833b300b5fe8b72ed34429a
font_00_sfnt_off00015c96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C96 4624 bytes
SHA-256: 0decf911caf860ac0b29a1140a3a295fb5946efcdc57b2926f33b2706a0da9ae
font_01_sfnt_off00016cc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16CC0 5320 bytes
SHA-256: 4cf98e78ab7e4e497292c4043939aa19a7c193f53cd9e867277a8b17c4011c83
font_02_sfnt_off00017ebd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17EBD 4728 bytes
SHA-256: b4c63332af5218ba2dca6d8ff962b491871841ad5fcbcd155612a28a5a5ac52e
font_03_sfnt_off00018dbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18DBD 15980 bytes
SHA-256: 87a6ccb2eefdb5bee071b35c5bf318251934ce933be8a914a210082e785d624a