Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a059f7f3f031046…

MALICIOUS

PDF

84.1 KB Created: 2021-09-16 09:51:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 2888070a938dc2e840ea32459d54ae78 SHA-1: d2a7bbdcda419e10d6e0b78155ee7c636ea5bf3f SHA-256: 9a059f7f3f031046faffa00f221420328177d4918a294e53872f175c2e281ebb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised or disposable domains, indicating a link farm designed to lure users to potentially malicious sites. The ClamAV detection and ML classifier strongly suggest a phishing or trojan payload delivery. Although no scripts were explicitly extracted, the PDF structure and link farm behavior are consistent with techniques used to distribute malware or conduct phishing campaigns.

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://synerhu.ru/uplcv?utm_term=best+escape+games+online+free+unblocked PDF link annotation
    • https://foodphotoshop.com/userfiles/files/21679305356.pdfIn PDF document text
    • http://thegioixedap.net/upload/files/wataninenis.pdfIn PDF document text
    • https://egokituz.eus/files/galeria/files/vobalodivarapu.pdfIn PDF document text
    • https://ww150003.linebot.net/upfile/files/20210912204916.pdfIn PDF document text
    • https://steklo-shik.ru/userfiles/file/92606445678.pdfIn PDF document text
    • https://a-pointpro.com/cms/ckfinder/userfiles/files/toxenedavixowuker.pdfIn PDF document text
    • http://bluecars.pl/userfiles/file/64605379679.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/27909192c2c31cd152a0495dbeb556d2/jumelibumadagafuvoviduniz.pdfIn PDF document text
    • https://magicdiscoradio.com/userfiles/file/7040252024.pdfIn PDF document text
    • http://28777886.com/Lpf/UPFILE/userfiles/files/29350404302.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/161415c24e935c---ragufuwakowosunokowew.pdfIn PDF document text
    • http://asja.ua/userfiles/file/sipoz.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/161341b3d9c800---69761938571.pdfIn PDF document text
    • http://thaimassagemodel.com/ckfinder/userfiles/files/79685606780.pdfIn PDF document text
    • https://pilot-nav.socksnbows.com/ckfinder/userfiles/files/lufuvakupowiguxixukikufa.pdfIn PDF document text
    • https://www.drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16137237cd41bb---16733499557.pdfIn PDF document text
    • http://100gastro.cz/soubory/files/sizuk.pdfIn PDF document text
    • http://hydrogears.com/survey/userfiles/files/jaromewaxadiduribopapuf.pdfIn PDF document text
    • http://aqcorth.specialty-match.com/upload/files/bafukupomivolog.pdfIn PDF document text
    • http://worldplastsolution.com/ckfinder/userfiles/files/bawufisumajazuz.pdfIn PDF document text
    • http://slsnn.ru/content/files/61844581607.pdfIn PDF document text
    • https://nslogisticservice.com/userfiles/files/16507845432.pdfIn PDF document text
    • http://caytrong.vn/Images_upload/files/tulalojiso.pdfIn PDF document text
    • http://mexvp.com/ckfinder/userfiles/files/kabebebetosesojotagebida.pdfIn PDF document text
    • https://congtydaihai.com/upload/files/19397671860.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_off0000e2b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2B7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000face.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFACE 11348 bytes
SHA-256: 7ac5ff08d5a515501a32e7020bd77c7a5d3dce1c95b58a9b0db952985986090a
font_02_sfnt_off00011519.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11519 17580 bytes
SHA-256: aa700acf5e4e7351d45d9d067525bb9ebb555a4f08fb255b1eba799f7a23713f

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