Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfaf82ad46870c59…

MALICIOUS

PDF

81.6 KB Created: 2021-03-12 08:14:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 82182aa96bd4094db7b44904342b12ec SHA-1: c9fd32151d5812dce597f4efce00a0cc975ec55e SHA-256: bfaf82ad46870c59e73cfbf044fa03c16babd44ddf381e847520e8ac04ff7336
186 Risk Score

Malware Insights

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

The PDF file was identified 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, suggesting a link farm or SEO abuse tactic. The primary purpose appears to be directing users to potentially malicious or phishing content hosted on external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://bologen.ru/wix?keyword=kinetic+molecular+theory+of+liquids PDF link annotation
    • https://widosutolitidaf.weebly.com/uploads/1/3/4/8/134847614/tuxuzut.pdfIn PDF document text
    • https://vepimogarib.weebly.com/uploads/1/3/4/8/134856589/9b56fb7f4694.pdfIn PDF document text
    • https://babotiditufo.weebly.com/uploads/1/3/4/6/134694550/zomawodugu-kerujutolofiva.pdfIn PDF document text
    • https://kunobutos.weebly.com/uploads/1/3/4/2/134234797/rijupasazevi-depaleva-bavit-nabanaf.pdfIn PDF document text
    • https://gikanirirexenad.weebly.com/uploads/1/3/0/7/130776133/febodipogok-xapozukidupevi.pdfIn PDF document text
    • https://dudisavaw.weebly.com/uploads/1/3/1/3/131380109/resinetufates.pdfIn PDF document text
    • https://rupogasonewu.weebly.com/uploads/1/3/4/6/134653860/32d02fda75fa9.pdfIn PDF document text
    • https://marikikugawu.weebly.com/uploads/1/3/5/3/135326377/2125023.pdfIn PDF document text
    • https://getovutiwezo.weebly.com/uploads/1/3/4/6/134696705/1849073.pdfIn PDF document text
    • https://fatilisuwojumo.weebly.com/uploads/1/3/4/6/134652656/15deff4dcf6c2.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://uploads.strikinglycdn.com/files/2f9c37d5-6f54-4bf0-bc6a-fe9779164917/winovixeperadiduv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b1617c1-e6af-4e94-bf85-f6f7b3053f12/is_the_undoing_on_hbo_max_or_hbo.pdfIn PDF document text
    • https://s3.amazonaws.com/zedudo/bomberman_snes_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/rewepalazamiso/lesuvafawiradugifunuzivu.pdfIn PDF document text
    • https://s3.amazonaws.com/satedafadusizo/how_to_clean_washing_machine_pump_filter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20c81ed1-17bf-46d5-b9c1-1122b9be852f/minuteman_hose_load_step_by_step.pdfIn PDF document text
    • https://cfecb619-c0f5-418d-ae9d-b1147643389f.filesusr.com/ugd/4cd51e_3ca3e236b9114229ad7ba73740169c00.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bugutaj/jepena.pdfIn PDF document text
    • https://160e4e15-e27a-4ef2-9b26-f67fc0969a86.filesusr.com/ugd/cbdbb6_8967ab03588e4c56aae3f09db2240960.pdf?index=trueIn PDF document text
    • https://8488b7ac-84bc-45ae-88ed-26841205fc59.filesusr.com/ugd/7cda3c_7cf80a6572e248f4b4f34fccd5581730.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/01522e7d-d75f-422c-aa9b-5f5658e80eb1/kubagixu.pdfIn PDF document text
    • https://80c93ba6-74df-4afb-9852-3a83eaba20e3.filesusr.com/ugd/4cf28d_2ef0335fa15a4e50802d2caedeac92a6.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f406.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF406 5340 bytes
SHA-256: b6b2163ad4ab92d6ca3d766ae153a4d7bbc7ea44093069e1f905376f1dd2dbb2
font_01_sfnt_off00010601.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10601 10752 bytes
SHA-256: 2b2446d3c035668f5d7fcf129cef108051e0e90a9b24d002ecec4bed638acbef
font_02_sfnt_off00012ab3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AB3 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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