Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdcdec5e4564d20b…

MALICIOUS

PDF

90.9 KB Created: 2021-03-04 17:32:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: dd0ecb876653cc2eb1f00cb4066f420c SHA-1: 76e2bbca0c8dc24750971cd6f774851b50d412e5 SHA-256: bdcdec5e4564d20befc6e48ab3cde2feb6605124c77171be8871e3ac0f2255d8
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or phishing operation. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were extracted, the embedded URLs and the PDF structure itself are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 6

  • 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 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://druttle.ru/strik?utm_term=how+to+draw+realistic+eyes+from+the+side PDF link annotation
    • http://lafuvenilimagi.iblogger.org/bulova_marine_star_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/litonesi/v8hjFnt/mamajapupajojabolop.pdfIn PDF document text
    • https://cdn.sqhk.co/gukitane/hihjiez/vuniriforugunozagarafubu.pdfIn PDF document text
    • https://kirimobo.weebly.com/uploads/1/3/1/0/131069812/tesetijesuxevifirifu.pdfIn PDF document text
    • https://cdn.sqhk.co/gevolonovare/HEidig8/9093647150.pdfIn PDF document text
    • https://dapapakutuluj.weebly.com/uploads/1/3/1/3/131384169/9962520.pdfIn PDF document text
    • http://sesosorav.iblogger.org/27225791219.pdfIn PDF document text
    • https://cdn.sqhk.co/gabixeme/foia6t5/fish_wars_hungry_fish_game_unblocked.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://981168d4-05fc-44b6-871d-73371d7e8cf1.filesusr.com/ugd/87d215_4b6bea6b57b44179b4dde3de724cff19.pdf?index=trueIn PDF document text
    • https://6d251753-49d0-4f5b-a278-10ed1cacc9d0.filesusr.com/ugd/5c139a_3eba599d414e44b5be2ed5ac32b13618.pdf?index=trueIn PDF document text
    • https://9c789f27-b70c-4c9d-9e83-211ee8f99b38.filesusr.com/ugd/bdeb4c_89d05e123ae84da2b1701b34a2104631.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nafamaragisek/blurred_transparent_background_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6149f10b-6328-40a2-8311-358eb9d83225/reading_comprehension_books_for_2nd_grade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98fc4b04-cef1-4b8f-918d-b854fbc86624/53250170900.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a700459-9afd-4e6e-91c9-29f0ce048cab/what_is_the_moral_of_the_story_of_the_boy_who_cried_wolf.pdfIn PDF document text
    • https://393102e6-89af-4738-8cad-89662dba8dc5.filesusr.com/ugd/33a16d_ab5be4dcd28e43f4afdc8d1a43949d01.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kuxegu/fluke_fishing_report_cape_cod.pdfIn PDF document text
    • https://d926c97b-7f3b-4ec8-a52a-318bcb589338.filesusr.com/ugd/120f26_fd5921541b97453ca661e85caed970d5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wutezigojuxi/33199949344.pdfIn PDF document text
    • https://s3.amazonaws.com/xepululejiwof/42125105862.pdfIn PDF document text
    • http://nisuzadusidu.epizy.com/18934373251.pdfIn PDF document text
    • http://jawedujap.rf.gd/calculating_density_worksheet.pdfIn PDF document text
    • http://roxegut.rf.gd/how_to_prove_photosynthesis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db0faeb7-69e1-47c8-acfd-4b25651974de/wutunodesarogulakupejuli.pdfIn PDF document text
    • https://s3.amazonaws.com/bulolimepol/76420327609.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_off0001098d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1098D 5416 bytes
SHA-256: 7c06668d502bfda6c35f1cbfd31fa19ebe9f6bbddf35d4cdde4049e557c15f85
font_01_sfnt_off00011bd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BD9 1800 bytes
SHA-256: e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
font_02_sfnt_off00012467.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12467 10060 bytes
SHA-256: 1ec865ac191e6d529b972035fbcd69808b9fbad882b1db44368f90a37dcd54c4
font_03_sfnt_off00014718.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14718 16312 bytes
SHA-256: 531e37f64a2e7dc3bfb257675d9e6c644c7b1597f33ba9a969cd005a7ed65660

Open this report in the interactive analyzer, or submit your own file for analysis.