Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e07d5ec60024b5f…

MALICIOUS

PDF

90.1 KB Created: 2021-06-20 00:43:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 5e9d022029d568b081e70f41b8f2867d SHA-1: 782345ba73b574fb35ea3f3c73f5e0c6e07c5b56 SHA-256: 6e07d5ec60024b5fdc0b33f5aa6576d55358f563c0553d487a1414a36bb56f9a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm pointing to multiple disposable hosting sites, a common tactic for distributing malware or phishing content. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of numerous unknown URLs suggests an attempt to host and serve malicious payloads or redirect users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://magnachip.cn/userfiles/file/20210516053536.pdf In PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7159978007---67568008271.pdfIn PDF document text
    • https://airflow-skateboards.com/upload/file/jonigon.pdfIn PDF document text
    • https://lee-trading.tw/archive/upload/files/titekedunutim.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/oco3fisrhhh6a7a18ts1enpqbn/demofowafilutiwu.pdfIn PDF document text
    • http://bmcnx.com/userfiles/file/pexezusifezitik.pdfIn PDF document text
    • http://antwerp-reefer-tournament.be/argt/files/kofelufatikin.pdfIn PDF document text
    • https://ev-owners.jp/userfiles//files/37933639742.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609dc5de45e44---bonavire.pdfIn PDF document text
    • http://kondicionery-lubertsy.ru/upload_picture/file/nuxakesiterikifezolafafax.pdfIn PDF document text
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/0f0938c66262e2917996a267ae4078fb/6961319887.pdfIn PDF document text
    • https://diaochue.vn/userfiles/file/gowopedojal.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/qasfjqvm64evu8hravb1knvqc6/97650274035.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/6d10a4b1e4b7114ba8d596af8d5db8b1/zakupinegawuridiziwodu.pdfIn PDF document text
    • http://maidichike.com/upload/files/48911184384.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
    • http://fedorahosted.org/lohitIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=pal+pal+dil+ke+paas+new+version+mp3+downloadPDF link annotation
    • 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 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF6F 5196 bytes
SHA-256: 13d8cd97cedf66af0f166e2cd45c8539bf4689b37967f288a90ca61adb9758b9
font_01_sfnt_off0000f100.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF100 5616 bytes
SHA-256: bdd17fa7b3da79646aec2e0201ad75c432e52d04560c40477c034e8b9eb6249c
font_02_sfnt_off00010081.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10081 11668 bytes
SHA-256: 8be93946caeaca3c93a4a601d952a6cb9743f09dcf8917f5c6af9c2369d39f40
font_03_sfnt_off000128a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128A8 16144 bytes
SHA-256: f0a8b786da721c7415a59d91fbce3b20bbb98ea32e48857ac1ff22d53b00ec29
font_04_sfnt_off00013dac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DAC 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71
font_05_sfnt_off00014bac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BAC 3664 bytes
SHA-256: 697f23ad32bf186d8989f3d178c343c20c242326e7043d2cac1f1d25fcbb522f

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