Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0ea7ccd2df7a6f7…

MALICIOUS

PDF

92.1 KB Created: 2021-09-11 19:29:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: b7f42f121d545d65fc70fde6963589f9 SHA-1: 5b3c1601ad2fbbf67896c6447800bcc198866a27 SHA-256: f0ea7ccd2df7a6f774f599c47fc392119dff92fe4d98247b4a8da99b9e44b189
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The presence of a malformed exploit stream and ClamAV detection further supports its malicious nature. The document's content is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall structure points to a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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://irlanc.ru/uplcv?utm_term=free+keyword+ranking+report+tool PDF link annotation
    • http://srtprogetti.eu/userfiles/files/sizazunis.pdfIn PDF document text
    • http://giorgimpianti.com/userfiles/file/46052520253.pdfIn PDF document text
    • https://allmassage.net/upload/file/20210910203054.pdfIn PDF document text
    • http://abwjefferson.com/uploads/files/sirofakowetedos.pdfIn PDF document text
    • http://tao-ssct.org/data/upload/file/dizomegixer.pdfIn PDF document text
    • http://kccmaul.com/files/files/90033567919.pdfIn PDF document text
    • https://sakkestadbil.no/userfiles/file/reratawasuvodivugavu.pdfIn PDF document text
    • https://lenaoyunlar.net/calisma2/files/uploads/dijuvofaw.pdfIn PDF document text
    • http://annabarons.com/files/files/ribebisaxudalexineji.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/daba3f7efe5c7ba2b634a0238d327081/xogidozasazi.pdfIn PDF document text
    • https://igruppe.no/ckfinder/userfiles/files/ketukakafut.pdfIn PDF document text
    • https://www.willmarareachamber.com/ckfinder/userfiles/files/4422780380.pdfIn PDF document text
    • http://omatsuri.kr/data/userfiles/files/pixozelog.pdfIn PDF document text
    • http://trip-sale.ru/userfiles/file/lusiwi.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/duoarqe24ad1ibumbbjfoj1sj7/forurasegebenu.pdfIn PDF document text
    • http://lempreintedubois.fr/userfiles/lempreintedubois.fr/file/92887084734.pdfIn PDF document text
    • http://bkht.vn/userfiles/file/fizaser.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137821b3fd62---xoxusoxavenanaxuz.pdfIn PDF document text
    • http://emailreceptionist.net/userfiles/file/66245461094.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613abfa33af26---51743194202.pdfIn PDF document text
    • http://sungwoo-n.com/userfiles/file/venibejotoganikabivew.pdfIn PDF document text
    • http://boonfagrandhome.com/user_img/files/nomubuzewolipu.pdfIn PDF document text
    • http://shinaval.ru/userfiles/file/16065549931.pdfIn PDF document text
    • https://madeinstlucia.com/userfiles/files/94163449586.pdfIn PDF document text
    • http://makesomenoise.hu/upload/file/62299342652.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_off00010414.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10414 10668 bytes
SHA-256: d8c6019f5ef5f439224442fb901348d0f6e1ebf549e19e4a59c12ba16c818773
font_01_sfnt_off00011c6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C6E 17864 bytes
SHA-256: 3de82fe4d2b823fba90a5babd616d70d3f2b045dc9d9bd5e05563cced5ba22cf
font_02_sfnt_off00014aae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14AAE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.