Malicious PDF — malware analysis report

Static analysis result for SHA-256 b56ef86001749884…

MALICIOUS

PDF

105.3 KB Created: 2021-09-08 06:04:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 12f7172ba60becb2efbb5085be911427 SHA-1: c4e1fddbc76925d2b7eb9e2eb093d619f89098b8 SHA-256: b56ef86001749884b4126273a1bf39138989f08b584dc924e064d1efce785e81
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and links to compromised CMS uploads and disposable hosting, indicating a link farm designed to redirect users to potentially malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. No scripts were extracted, but the PDF structure itself facilitates the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://nomylo.ru/uplcv?utm_term=international+carrom+rules+pdf PDF link annotation
    • http://adams-gold.ru/archive/image/file/fodadimakunadero.pdfIn PDF document text
    • https://fultoys.com/userfiles/96634314453.pdfIn PDF document text
    • https://ckmandarin.com/uploads/56494265520.pdfIn PDF document text
    • http://dongphuctqueen.com/upload/files/wobukolewesole.pdfIn PDF document text
    • https://traffictkt.com/viking1/uploads/files/19144703896.pdfIn PDF document text
    • https://www.q-jin.ne.jp/ckfinder/userfiles/files/68792077772.pdfIn PDF document text
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/4nui4l1h67jn2us24d7pd0ipkr/patatugajevuvifuvan.pdfIn PDF document text
    • https://topclassgardening.nl/images/file/sanibenirubudirixeralafub.pdfIn PDF document text
    • https://es21sys.com/userfiles/file/rinekazadarusapigamazefe.pdfIn PDF document text
    • http://aktasmatbaacilik.com/resimlerfiles/11234535101.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/160924a035734d---vewixuromupusila.pdfIn PDF document text
    • https://begili.com/uploads/image/files/64484663699.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607ef5efe86c7---44996710382.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/3e8aff7d9466879a67767fe4673a2885/93734781560.pdfIn PDF document text
    • http://ruegen-ferienhaus-schneider.de/userfiles/file/xojidolupe.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d243b12e70---bozoluzeni.pdfIn PDF document text
    • http://ovartec.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610464be7d750---80542055574.pdfIn PDF document text
    • https://betenagro.com/sites/default/files/file/wewijexikokumojap.pdfIn PDF document text
    • http://jinanxintiandi.com/userfiles/files/kolakokoxadepanurikijegi.pdfIn PDF document text
    • http://satisfytech.com/ck/upload/files/viwejudetodiguvuwexig.pdfIn PDF document text
    • https://hoya.hr/UserFiles/file/jerigelumatalima.pdfIn PDF document text
    • http://denledmpe.com/upload/files/nemomadukaripobazik.pdfIn PDF document text
    • https://karapinarinsaat.net/userfiles/upload/file/xexoxagonakuken.pdfIn PDF document text
    • https://bdaudit.ro/userfiles/file/sutinozi.pdfIn PDF document text
    • http://rchs1964.com/clients/5/58/580abc73d3aac4ea3a2bdd7c75327783/File/kodedarosififezi.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013a1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A1B 17120 bytes
SHA-256: 2e3775474aeae86082f4d108beb3c40835bc5994d45a2610fdb37efc5596fa5d
font_01_sfnt_off00016638.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16638 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00017e4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17E4F 10832 bytes
SHA-256: cd60bd6f9557923d72edfa8f88e6d7c0838dbe9b5af7265681d483a2052162a1

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