Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e7e83a73d054e3c…

MALICIOUS

PDF

87.9 KB Created: 2021-03-05 16:39:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 2117fe4ee0e7c3d9b552b458f3b7550f SHA-1: af1ed8d02a4d79ed859cea6a90c4fa46ae92a42f SHA-256: 5e7e83a73d054e3c2f0560e3a2ac5badb7ca0fb1c3064b1a4b13e3134f9a9247
186 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, which is characteristic of SEO link farms used to distribute malicious content or phish for credentials. The embedded URLs suggest an attempt to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://dugedepap.ru/wix?keyword=star+wars+battlefront+2+settings+pc PDF link annotation
    • https://naluzakagowu.weebly.com/uploads/1/3/1/4/131411806/e30f727759bc16.pdfIn PDF document text
    • http://tefitagesev.mypressonline.com/is_the_first_word_in_parentheses_capitalized.pdfIn PDF document text
    • http://mnatural.space/oregon_12v_chainsaw_sharpener_manualpvago.pdfIn PDF document text
    • https://rofunepez.weebly.com/uploads/1/3/2/7/132710772/vigunetijifazilik.pdfIn PDF document text
    • http://klossheff.xyz/lewurewazulijoxotitixukif92be8.pdfIn PDF document text
    • https://ragixadimeruwu.weebly.com/uploads/1/3/4/8/134897014/tesafanetidetorake.pdfIn PDF document text
    • https://pemugaladesav.weebly.com/uploads/1/3/5/3/135307247/8017845.pdfIn PDF document text
    • https://pulimogub.weebly.com/uploads/1/3/4/3/134312020/3b278d0.pdfIn PDF document text
    • http://fuxanujibiz.mygamesonline.org/tex_jpg.pdfIn PDF document text
    • http://laludinemolat.sportsontheweb.net/87304315142.pdfIn PDF document text
    • https://wofugegiperezaj.weebly.com/uploads/1/3/4/5/134528457/matudabadejarepobar.pdfIn PDF document text
    • https://mozufakumijisa.weebly.com/uploads/1/3/5/3/135333945/eeaa603e27917.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://7f58a6d3-5723-489e-a2bd-17fd91e1ddd5.filesusr.com/ugd/655495_810f2985e9544d3784c8c755866aa115.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/musokejixami/artificial_neural_network_ppt.pdfIn PDF document text
    • https://0eb00d84-361a-45dc-b346-1af5c8eb785c.filesusr.com/ugd/d79848_633d76cb11da4c03a3ffbaa254a98db2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sasufufa/labefurojimetewafilil.pdfIn PDF document text
    • https://98748e4b-3258-471a-903e-8ea98415cca0.filesusr.com/ugd/fd7405_f33d3d1cd4d344b4a1e979b32265b7fb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tumuzu/13432907896.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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF5A 4360 bytes
SHA-256: 716b28c7a282a410b9fbdf93b532d139263137c0c3cedef669517311e29168d5
font_01_sfnt_off00010ec9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EC9 5436 bytes
SHA-256: 917d00d385ab9242311eeee50c89fed143b87ccdc8e470fcced2f7a0daf1c4eb
font_02_sfnt_off0001215b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1215B 9952 bytes
SHA-256: 48dcd194ee90fc351ae773c2e119645fbf84254fd34f1f35fe41b4e67f4be62e
font_03_sfnt_off00014369.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14369 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34