Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5b5f6af33f2f6e2…

MALICIOUS

PDF

65.5 KB Created: 2021-04-20 17:44:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 9c9552721b36ee14b118eb0cbec4cd78 SHA-1: 40f94d14c7115b93b9148b24c432f3d5fce5f3b6 SHA-256: e5b5f6af33f2f6e2e7a9a8b13b628e19171228b5ec4e46b878d9473e5f7ae154
184 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 hosted on disposable domains, suggesting a link farm or phishing operation. The ClamAV detection and ML classifier indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the presence of numerous external URIs points to an attempt to redirect the user to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9263

Heuristics 5

  • 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
  • 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://ponafet.ru/strik?utm_term=surface+area+of+equilateral+triangular+prism+formula PDF link annotation
    • https://nuniladolu.weebly.com/uploads/1/3/0/7/130775245/b333a766eb8196.pdfIn PDF document text
    • https://vigodabazo.weebly.com/uploads/1/3/4/8/134872933/gekekowujid.pdfIn PDF document text
    • https://lelamibi.weebly.com/uploads/1/3/0/7/130738841/3312808.pdfIn PDF document text
    • https://zaxewunatomilar.weebly.com/uploads/1/3/4/1/134131499/6929648.pdfIn PDF document text
    • https://lodotimafigu.weebly.com/uploads/1/3/5/9/135981467/b36337c5344a.pdfIn PDF document text
    • https://fikanofuzak.weebly.com/uploads/1/3/1/4/131438747/matataduwigobub_regatul_zuwutatewixor.pdfIn PDF document text
    • https://nafugawiwira.weebly.com/uploads/1/3/1/4/131438392/7441867.pdfIn PDF document text
    • https://dofopukirisozut.weebly.com/uploads/1/3/1/4/131437491/lirupetupix.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gotuzarodeg.epizy.com/fb_story_app.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/72670366036.pdfIn PDF document text
    • https://bef89f6e-6323-4b84-ad9d-a44490bfcc4f.filesusr.com/ugd/96768c_cbd2350471cf4c02956743d7b0347651.pdf?index=trueIn PDF document text
    • http://zopijejezi.rf.gd/zajujevubimimowisige.pdfIn PDF document text
    • https://s3.amazonaws.com/takebemanijewok/addition_worksheets_grade_1_printable.pdfIn PDF document text
    • https://f74ea38a-ab8d-49a0-8d31-9a1d7ce64423.filesusr.com/ugd/5ceade_645f43626ba740b581b73ad18071a2f4.pdf?index=trueIn PDF document text
    • https://3f46bf15-0a8c-4e80-b3e5-a2e3bf90e008.filesusr.com/ugd/8e6e76_2a8273a5a1e94a7e8cecb225b084a531.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c2e577d-5951-470b-b7d0-c2183e7a7af8/tixedaniwajuvupa.pdfIn PDF document text
    • https://s3.amazonaws.com/fezenur/jisoxelekinixunob.pdfIn PDF document text
    • https://s3.amazonaws.com/wobuzisibal/mini_dapple_dachshund_puppies_for_sale_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2abd7ad7-1d32-4702-ae80-86fa9f28a98c/begulagatelokitivutuj.pdfIn PDF document text
    • https://7ae52be2-ba3c-41fb-8935-29281088223e.filesusr.com/ugd/affaa6_f5755b7086fd4dc19753a7c6c986b477.pdf?index=trueIn PDF document text
    • https://05e27880-d5e1-4d3d-8428-ba943e9300bc.filesusr.com/ugd/b56239_07d7a51b9fee40bb94f304d8bdd08f5b.pdf?index=trueIn PDF document text
    • http://jurukukixinom.rf.gd/graco_nautilus_3_in_1_car_seat_how_to_convert_to_booster.pdfIn PDF document text
    • http://jireredotusefor.rf.gd/zelewuwif.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e896.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE896 5564 bytes
SHA-256: 61d4cfcea594679287617bb6ea25afd7c18fd705227a5292dd8cf31814d9f6ae

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