Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ac45db919d5f6ad…

MALICIOUS

PDF

88.7 KB Created: 2021-08-15 11:17:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 597ae71fa4185e1c0cd2829146da7b43 SHA-1: 47469198537bf421e86a0314b0f784fb33e8d1f0 SHA-256: 2ac45db919d5f6adb6dfc43512eb2ae4a2f347f96bf091180d99f39ab0cd6f78
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier with high confidence. It contains embedded JavaScript and a link farm pointing to multiple distinct hosts, many of which are compromised WordPress sites. The embedded JavaScript and link farm suggest an attempt to redirect the user to malicious or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://royalgoodviewresort.com/Uploads/file/melodoriguz.pdf
    • https://durgabas.coop.np/ckfinder/userfiles/files/waxevurezekivuzetugek.pdf
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8b64d50f83---tagomazidijulu.pdf
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608524e2dde73---28170384896.pdf
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/3fcgpmff9pfgi2e8npf2f17aev/37950231826.pdf
    • https://szekszardportal.hu/userfiles/file/bixokumubiv.pdf
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dcb79a72d3---92203587914.pdf
    • http://unibeauty.com.br/ckfinder/userfiles/files/24836079704.pdf
    • https://digireg.sk/upload/savigejirone.pdf
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/54pq76tnsg0uhq0thlgg63iqha/69398396068.pdf
    • https://cakenepal.com/userfiles/file/58021796237.pdf
    • http://musclecar-taps.com/js/upload/files/vakutuwal.pdf
    • https://aynadakikemalizm.com/resimler/files/14516703387.pdf
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/3ocdsm7s0fk0dhseiv06g2oviq/velapawemamepukinu.pdf
    • https://www.potravinyav21.cz/ckfinder/userfiles/files/xulitij.pdf
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/1607619bacbd4f---78051114501.pdf
    • http://atek-ent.com/upload/file/90769560463.pdf
    • http://hyswimpool.com/userfiles/mewezarirojivurefolowuvi.pdf
    • http://barsugo.com/ckfinder/userfiles/files/59650329278.pdf
    • http://autoshiftbid.com/fckeditor/userfiles/file/41914407462.pdf
    • http://hjtech.org/admin/upfile/file/xafawajakitepononiwiweb.pdf
    • http://biosite.ru/images/news/file/dopoxofuzirevutijavu.pdf
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac0bbb44f2e---siwigilipepisisogatizum.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5570753249---rejiges.pdf
    • https://zionapostolicministries.org/uploads/file/53209015800.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=gta+5+vip+work+double+money+2020
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1c2.bin
b6d2ae45703a9a41cf7a31d49709195011d22873c476504ae45af916e8438394
pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C2 18428 bytes
font_01_sfnt_off000120aa.bin
6571649c925d5e8c9741184935d81f5de237be1acbe83fac06bcad48d3c017c3
pdf-font-stream PDF embedded font (sfnt) at offset 0x120AA 11396 bytes
font_02_sfnt_off00013b76.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13B76 16792 bytes