Malicious PDF — malware analysis report

Static analysis result for SHA-256 e14e696d2267a215…

MALICIOUS

PDF

70.8 KB Created: 2021-09-23 13:17:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 1dd56d16148c6377361c7817cd914958 SHA-1: 8e2d92c44e90ec5b073ff2cfeb8a83fcde1f1e22 SHA-256: e14e696d2267a21598c79c619947bb1c18f7e41ec300d6ec80bed6e93b9d9a73
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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
  • 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 https://crewmak.ru/uplcv?utm_term=romantic+shayari+shayari PDF link annotation
    • http://zoldjogsi.hu/uploads/files/nefitogurufu.pdfIn PDF document text
    • https://bikidi.com/UpFiles/WebEditorFiles/file/gatexajinojobuvawomebare.pdfIn PDF document text
    • https://www.koreayokogawa.com/ckfinder/userfiles/files/34320658951.pdfIn PDF document text
    • http://dent-pro.cz/pic/file/83684630181.pdfIn PDF document text
    • https://alihuata.com/userfiles/file/rawuguxedakeku.pdfIn PDF document text
    • https://stalbeckers.nl/userfiles/image/file/posezulifevodokimozeteg.pdfIn PDF document text
    • https://radio-clipa.ro/userfiles/file/gabavidibalirimokifos.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136079832528---tuwagogikajifewazu.pdfIn PDF document text
    • http://gucaoyun.com/uploads/file/171055456735.pdfIn PDF document text
    • https://dreamscapes.ca/dream_scapes/userfiles/files/ragefuroviwetave.pdfIn PDF document text
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16138279366611---gozimuwexagaloxemojar.pdfIn PDF document text
    • http://poongdung.com/FileData/ckfinder/files/20210922_9594FC42946FB8FD.pdfIn PDF document text
    • https://ystechpro.com/nbloom/fckuploads/file/14861923779.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1614b5f35b75fd---96216551206.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/8kjotal7gd8qgqafpcig0daihi/pidukodabimaj.pdfIn PDF document text
    • http://safetruck.gr/images/file/16021052100.pdfIn PDF document text
    • http://optykglowacki.pl/obrazki/files/reputugakaripuvajawibozaw.pdfIn PDF document text
    • https://matratva.in/userfiles/file/pasozaxasug.pdfIn PDF document text
    • http://www.tractortools.cz/ckfinder/userfiles/files/nikugizubefedabizaxif.pdfIn PDF document text
    • http://gdgom.com/upload/file/2109051332515233815dgrn3g0temc.pdfIn PDF document text
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/4d9d7be69ee4b08ac79a2f2ee29135c8/wufenibusuxojiduzalipefoz.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b2c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2C4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cad6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAD6 16668 bytes
SHA-256: 768966a72d79adae50f4063666d1acde8f153c58e6d6e466a1ae8b1dcb6b8452
font_02_sfnt_off0000f60c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF60C 10476 bytes
SHA-256: 7294428be360ffef7a03ac7a84bd9e13ac6504884c04af466aca383409d01467