Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c1093b13d517b5f…

MALICIOUS

PDF

89.3 KB Created: 2021-05-24 03:46:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: d267958559d991ecd7cf0d937d1822f8 SHA-1: 0b7e6cd9842e2f9ca4152691b9ffe5b2d8cafa95 SHA-256: 2c1093b13d517b5f7fdb8fa9cbdac901a0c1c4766825ef9150e09f3187929b95
186 Risk Score

Malware Insights

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

The PDF contains a link farm with multiple external URLs, including one pointing to 'jottigo.ru' with a search term for a movie download. Heuristics indicate a 'PDF_SEO_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM', suggesting the document's primary purpose is to redirect users to potentially malicious sites. ClamAV also detected this file as 'Pdf.Phishing.Trojan'. No scripts were extracted, but the structure strongly suggests a phishing or malware distribution lure.

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/strik?utm_term=beautiful+creatures+full+movie+download+in+hindi+480p+filmyzilla PDF link annotation
    • https://falerelijiwega.weebly.com/uploads/1/3/4/6/134612416/2cbf92c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465274/normal_60512a166c737.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481994/normal_6043bbcd27566.pdfIn PDF document text
    • https://newavutija.weebly.com/uploads/1/3/1/8/131871734/rizesanogegireriv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402706/normal_605c8b8d41c0f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413362/normal_6013ca31cba8a.pdfIn PDF document text
    • https://gepogixuzusesil.weebly.com/uploads/1/3/3/9/133999736/36373716d8b49c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447276/normal_5fd666267e97d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368742/normal_6050677711055.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496818/normal_6018a1e97dfe9.pdfIn PDF document text
    • https://firuruxuzero.weebly.com/uploads/1/3/7/5/137502241/lalikagipet-gowiliwata-kesorixusitu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463526/normal_6043c16ca344a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489607/normal_5fe464b176412.pdfIn PDF document text
    • https://zugogulubituwo.weebly.com/uploads/1/3/4/2/134266111/majunojumizozaxa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/eec9b06c-7070-4856-978b-65958b80e39b/54014116813.pdfIn PDF document text
    • https://s3.amazonaws.com/sisaxu/axis_cube_l_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fea36cb-631c-414d-a84d-accca2d6188b/what_is_the_difference_between_excel_2013_and_2016.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69ea44c7-15ff-477c-bf74-424edc2f22f7/how_to_charge_garmin_astro_430.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33490fb6-db61-44b1-8842-1beca25da970/power_pressure_cooker_xl_home_canning_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a8fd67b-2f92-4255-9877-b9bc36b2b485/what_do_blood_vessels_in_the_eye_mean.pdfIn PDF document text
    • https://s3.amazonaws.com/zurovajij/tutorial_dreamweaver_cs6_lengkap.pdfIn PDF document text
    • https://s3.amazonaws.com/xapidajovaji/caresource_indiana_dental_provider_manual.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e553.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE553 5640 bytes
SHA-256: ec18b10dd351aa218eff3bcbb1d3e50b295a49d28c763eca751b33de19854545
font_01_sfnt_off0000f8c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8C9 6172 bytes
SHA-256: 72429d3cfa47bb9293953080b711f2e648b20f17b3e278fe22aaf6b5ef7a1d48
font_02_sfnt_off00010dce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DCE 13884 bytes
SHA-256: c713e45294bbf90db7c4703f6b2b920232112c4b78c47f4d556e72d880da09da
font_03_sfnt_off00013b79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B79 17688 bytes
SHA-256: 50a35e854fc10cdeb474af5f1203c7cde18e430bb3e6846a5e53eb1dbeb62dfa

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