Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c65dbf54d60a534…

MALICIOUS

PDF

78.9 KB Created: 2021-03-05 17:31:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: bddccb309236d253aed112d0b6bc4068 SHA-1: c9c8160545c1ac1ef3de6dd309633038b4afcf60 SHA-256: 3c65dbf54d60a5340745f7ef1570a01025f4db0b14099d8245895758338827f6
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are to PDF files, suggesting a link farm designed to drive traffic. The primary URL, fokemale.ru, is likely part of a phishing or scam operation. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external links indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://fokemale.ru/strik?utm_term=are+chai+lattes+keto+friendly PDF link annotation
    • https://mifabawir.weebly.com/uploads/1/3/0/7/130776047/rimejopa.pdfIn PDF document text
    • https://xuvesebitewetok.weebly.com/uploads/1/3/6/0/136086761/lisabebonapoxuvufiti.pdfIn PDF document text
    • https://cdn.sqhk.co/kapideto/bXja2lN/85553239009.pdfIn PDF document text
    • http://dutadone.22web.org/96464918632.pdfIn PDF document text
    • https://cdn.sqhk.co/kupuruvew/WJT7igL/duplicity_used_in_a_sentence.pdfIn PDF document text
    • https://roguraluvi.weebly.com/uploads/1/3/0/7/130776180/c6dd6fafb9c55.pdfIn PDF document text
    • https://belibezininu.weebly.com/uploads/1/3/4/8/134850089/kewuwumoguponuno.pdfIn PDF document text
    • https://jafipununevov.weebly.com/uploads/1/3/0/8/130814040/7956150.pdfIn PDF document text
    • https://julovupepopa.weebly.com/uploads/1/3/4/5/134522834/1851437.pdfIn PDF document text
    • http://xigepidi.22web.org/what_is_qualitative_research_design_according_to_authors.pdfIn PDF document text
    • https://mamumudud.weebly.com/uploads/1/3/0/8/130814078/43ce5397e61a6b1.pdfIn PDF document text
    • https://gopilabuvimira.weebly.com/uploads/1/3/1/4/131453416/1510154.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/baritexovopa/latest_android_mobile_operating_system_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/jemazejodep/xedovi.pdfIn PDF document text
    • https://e192e36c-395d-4660-9df6-aa7aed00c30a.filesusr.com/ugd/3aee12_72d173e97537465ebea3a37a268ad4e3.pdf?index=trueIn PDF document text
    • https://13adc596-845f-4f4a-b539-e2c04a0a4b5a.filesusr.com/ugd/6e2da7_77c4f1e5fbb649e0a0bcb8e3d5ada3d5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tarizirefevifab/android_studio_run_on_real_device.pdfIn PDF document text
    • https://s3.amazonaws.com/dowesitobuga/gumodabarasapabigiruwoku.pdfIn PDF document text
    • https://s3.amazonaws.com/gajakelegeza/ct_file_bng_adobe_reader.pdfIn PDF document text
    • https://6fd4412c-3e6e-4f21-a9af-8137ffc6c0d9.filesusr.com/ugd/03469c_05eceb366a3d4ad1890779f7a480a9cc.pdf?index=trueIn PDF document text
    • http://muropij.epizy.com/kugerijarubolupanuxodema.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f58e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF58E 5264 bytes
SHA-256: 6175497c7498eb266edd29d60cafc8a1a6334dde95753514e3ce18868327542f
font_01_sfnt_off00010778.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10778 11760 bytes
SHA-256: 83bf82fd358d63d78d71588dd402dea1b01f47830029165dc7507409b08d2bed

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