Malicious PDF — malware analysis report

Static analysis result for SHA-256 df119f0f6027e7f6…

MALICIOUS

PDF

78.7 KB Created: 2021-09-23 01:54:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 95d2972f7e6ef2e0baff9a7a6c59a7ae SHA-1: 29606cdc9ab4db1906a746b21775cae7db67b9ec SHA-256: df119f0f6027e7f66cca14b0237f07f19347ee016b8f82eb93d04f8d8859c7bf
176 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. Multiple heuristics indicate the PDF contains numerous external URIs, some pointing to IP addresses and others to compromised CMS upload directories or disposable hosting. The embedded URLs suggest a phishing or malware distribution attempt by directing users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://infrive.ru/uplcv?utm_term=materials+design+android PDF link annotation
    • http://vit-physio.de/file/72160273208.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/161490b01bdc32---54381170728.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/161472658cae6f---79944767069.pdfIn PDF document text
    • https://peoplesmodelinternational.com/ckfinder/userfiles/files/poxekesupijapipusomep.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/2bmfsmtqm9bfn4jmmvtrs1m0u5/wisoxadudojude.pdfIn PDF document text
    • http://yourhealthyanswer.com/ckfinder/userfiles/files/gavemuxef.pdfIn PDF document text
    • http://investin-khj.ir/ckfinder/userfiles/files/51874278126.pdfIn PDF document text
    • https://inprovitpuertorico.com/ckfinder/userfiles/files/65918053072.pdfIn PDF document text
    • https://adian.eus/files/galeria/files/57437623868.pdfIn PDF document text
    • http://denizyemek.com/images/fck_upload/file/53348134819.pdfIn PDF document text
    • http://indexone.ru/upload/file/bufusutumidenoxafar.pdfIn PDF document text
    • http://lmleadmanagement.com/userfiles/files/vinujamejuso.pdfIn PDF document text
    • http://140.121.161.111/ckfinder/userfiles/files/nudosatujobodivowifonaju.pdfPDF link annotation
    • http://sgadsahodayatarntaran.org/sahodyatarntarannew/userfiles/file/kidutobifi.pdfIn PDF document text
    • https://xedulichhaiphong.vn/images/news/files/lupegaduzev.pdfIn PDF document text
    • http://cyklo-sport-servis.cz/UserFiles/File/69578682081.pdfIn PDF document text
    • http://moskvaznaet.ru/upload/files/divuxisamelos.pdfIn PDF document text
    • http://szakkepzosiklos.hu/upload/file/wemanis.pdfIn PDF document text
    • https://doanandieuduong295doson.vn/namthuan/images/news/files/62757499187.pdfIn PDF document text
    • https://retake.dk/ckfinder/userfiles/files/fagifira.pdfIn PDF document text
    • https://whiteplacard.com/UserFiles/file/sudik.pdfIn PDF document text
    • https://rowsontw.com/shopadmin/upload/files/86866023216.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_off0000cf20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF20 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e737.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE737 10416 bytes
SHA-256: 32bfffe831ecb9344ee7007455c2cf6900d01ad352e14249244f0ceee809ab09
font_02_sfnt_off0000feb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEB0 17816 bytes
SHA-256: 45bc3a549f936323e9fe016e5c6c0da3306b25551dc5b3c09e67091076c8e8d4

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