Malicious PDF — malware analysis report

Static analysis result for SHA-256 e75952bcf22c3533…

MALICIOUS

PDF

85.5 KB Created: 2021-03-24 07:22:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 338e8c3045bd19d7a9f7db3da868335b SHA-1: ea5ff30503dacd00eb10e956e41bc42b3273313c SHA-256: e75952bcf22c3533078358813176cf93a122449cf5c1aaede3453c91fddde058
186 Risk Score

Malware Insights

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

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 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/wix?keyword=star+wars+galaxy+of+heroes+how+to+get+free+crystals PDF link annotation
    • https://cdn.sqhk.co/xuvisisitinu/ggzVo9Q/gebojoxepigupol.pdfIn PDF document text
    • https://cdn.sqhk.co/vusabutam/aQhh9cJ/ripofemitafutelexenimo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411250/normal_602fdbb9527fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502833/normal_605a04b2a845e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366969/normal_602b4f1fcd1cc.pdfIn PDF document text
    • https://cdn.sqhk.co/xudekutof/jjjip5b/crazy_taxi_driver_mod_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/litalile/fEhd6lW/farokipide.pdfIn PDF document text
    • https://cdn.sqhk.co/lebogomatoze/grzjjic/pair_monster_blaster.pdfIn PDF document text
    • https://cdn.sqhk.co/bivuwusim/hjjkgfe/powaxemumob.pdfIn PDF document text
    • https://cdn.sqhk.co/xevowuto/mT2bhjt/field_hockey_coaching_clinics_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/zudilubal/M6GKghH/testicle_drop_puppy.pdfIn PDF document text
    • https://cdn.sqhk.co/marezotije/K3Z8tif/tujuk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392667/normal_6039aa2b53c4c.pdfIn PDF document text
    • https://cdn.sqhk.co/tigadikem/ehdjVUI/44799918340.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/godoremitiwuja/inshot_video_editor_cracked_apk.pdfIn PDF document text
    • https://46ebecaa-9490-439b-bba6-ee77f1a6ca93.filesusr.com/ugd/cee8a1_6d5833408fad4bb087e2b42eecf4b542.pdf?index=trueIn PDF document text
    • https://0ac950e2-707a-4e47-8bf4-daface0ea9db.filesusr.com/ugd/356f11_9e3883a7ed5e49d3884ef511c137be51.pdf?index=trueIn PDF document text
    • https://689a2394-1721-4ce0-b6f7-af9f1dc0d621.filesusr.com/ugd/0f5b72_d8ae0867383e4aac8d4764f1dadd63ad.pdf?index=trueIn PDF document text
    • https://46ebecaa-9490-439b-bba6-ee77f1a6ca93.filesusr.com/ugd/cee8a1_b65cc59267e447c8a2400a6b2d5f6a83.pdf?index=trueIn PDF document text
    • https://3c1efe6f-6e34-41bb-a2c4-2be85dd3cb33.filesusr.com/ugd/41f880_8559985aee7d4f39966efe1f78783572.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wolawatin/clariant_chemicals_annual_report_2018.pdfIn PDF document text
    • https://493f174a-a540-412c-bacb-e5b7b26cbfcf.filesusr.com/ugd/95bb70_55b64ba7b81b4fdb9c255edbfa92770c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vebenok/seven_little_words_answers_march_22_2019.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f882.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF882 5508 bytes
SHA-256: ccb589048b706ea6a9a2320da6a41d8d3069fe7bf998347d42f1ffb370844e16
font_01_sfnt_off00010b57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B57 11004 bytes
SHA-256: 1bb108b2c1b3c321921585323bc466e3bc0e2334704412b906722321387aebd6
font_02_sfnt_off0001308f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1308F 16116 bytes
SHA-256: f8e326b96df6c0457890c6346fd7f60b91beb129051a642dbd03fdf119a21fd7