Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f215ea8f2dbaa6c…

MALICIOUS

PDF

81.4 KB Created: 2021-09-01 07:00:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 80da6db319f84e0c762f945f430d030b SHA-1: 6cd2a9fc1a29b57623139f5ba82cf08d78f372f3 SHA-256: 0f215ea8f2dbaa6ce77699db984767f1d59900eb067f98df85fd7476d9ded44d
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with multiple URLs pointing to potentially compromised WordPress sites hosting PDF files. This suggests the PDF is designed to lure users to these sites, likely for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 https://gbeequestriansurfaces.com/wp-content/plugins/super-forms/uploads/php/files/jibtqnun3lmn3sqpnd9erevv0q/81130803820.pdf In PDF document text
    • https://legacyltg.com/wp-content/plugins/super-forms/uploads/php/files/67ac1da8d4931c97636eb25ba5fa87e5/fukolixafor.pdfIn PDF document text
    • http://benetalent.com/upload/files/22090257215.pdfIn PDF document text
    • http://otoozevran.com/resimler/files/54475647269.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/8b96a2cfe4c50cdb5b5cdfcff362e1d0/winubugakapi.pdfIn PDF document text
    • https://kibledergisi.net/resimler/files/10728605503.pdfIn PDF document text
    • http://deurenhanger.nl/userfiles/file/36401856286.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/h93b10nf3lbi1jjdsp6rq3gea1/sotufarujoxok.pdfIn PDF document text
    • http://inistor.com/ufiles/files/labepesukese.pdfIn PDF document text
    • https://hobbes-group.com/upload/files/wesuwaxulasex.pdfIn PDF document text
    • https://phunhai.net/upload/files/58439784487.pdfIn PDF document text
    • http://zbirozskepodzamci.cz/userfiles/bixoxejipiferutevolife.pdfIn PDF document text
    • http://sport-way.ru/img/file/31824176232.pdfIn PDF document text
    • http://rrbrentacars.com/files/others/nodojadeb.pdfIn PDF document text
    • http://antifftech.com/uploadfile/file///2021050509424724.pdfIn PDF document text
    • https://smartcirclegroup.com/userfiles/file/bokumatomuvi.pdfIn PDF document text
    • http://laweasy.kr/userfiles/file/93090857133.pdfIn PDF document text
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/r5s90bmajg1ciqkmgnnr0kjpnr/noletixuzotodexevik.pdfIn PDF document text
    • http://alphabodysupplements.com/newerac2c/userfiles/file/bowagebesilufirakukuzi.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/66105013084.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/th07t1opfcg208pmgelg3kklgs/lavexexil.pdfIn PDF document text
    • http://ajivikafinance.com/userfiles/file/30215983197.pdfIn PDF document text
    • https://dancleland.com/img/upload/file/36915802592.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=artificial+intelligence+quiz+with+answersPDF link annotation
    • http://s292376414.onlinehome.fr/datas/imgmail/file/xedilixojunokitiz.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_off0000d9bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9BF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f1d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D6 10868 bytes
SHA-256: 4fdf2d2717d5532f82d3ef561996616df9542aa751ae749eaf2577419c19f80d
font_02_sfnt_off00010ab3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AB3 16940 bytes
SHA-256: cb51ad974efda6f782a209ede9a56acbf0868a4543914a63aa6f4136f0910893

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