Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e14155524d00637…

MALICIOUS

PDF

104.4 KB Created: 2021-06-30 23:56:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f249d1596736fb553a447737394f1512 SHA-1: 43acc9df6e4a5000c91147a4681e30405bba4feb SHA-256: 3e14155524d00637fc1966fee420a7c700ccd220c38ac67c74dc357dbbc350a1
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other disposable hosting. These links likely lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://chupwo.com/editor_upload/file/49139864705.pdf
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/4935cff451fdbb5aa8c7eb70a6db15b9/bavezasivumo.pdf
    • http://vaness-sens.fr/ckfinder/userfiles/files/55167089222.pdf
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/lmnou86u86ak1n0c9ee2aikli9/19117658957.pdf
    • http://charivne.info/images/file/40546015208.pdf
    • http://asokmontridental.com/userfiles/file/jejawixotapidavup.pdf
    • https://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/371ml5vp95bg15t0cdoo96g9a1/45922017888.pdf
    • http://altinay-law.com/images/file/2000222032.pdf
    • http://topas.lt/userfiles/file/vexevugemivepedasaf.pdf
    • http://nsdadventist.org/FCKData/file/45716554982.pdf
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aacfd513a19---85282714124.pdf
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/2261119c3b5758e6a08ba12d8a1c0c0f/27066060608.pdf
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609f7a79ee4e9---buvitapubudivogatumepevom.pdf
    • https://postelezmasivu-zlin.cz/ckfinder/userfiles/files/13103552324.pdf
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8e618f21a4---nomipiwirixepowob.pdf
    • http://nomorecpapmachine.com/userfiles/files/loxizanigifusidunadewobu.pdf
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160ae1472e7619---fiwosubuxolusutolegi.pdf
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e689eeab1c---rejalamajekezo.pdf
    • http://nutronicltd.com/userfiles/file/40374036429.pdf
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/46ae2d09a5c9cb72ff2b1626675318fe/41623314210.pdf
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/1843772ab728b9488616b54358255c58/96377019614.pdf
    • http://ucity68.com/clients/e/ea/ea220da86df44fb0ae3b7c8e8295ccc1/File/wowipiponejeb.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=death+trips+gameplay
    • 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_off000137b7.bin
5efee190a69e009578e16b9321eaaea7c9f608c7f37802a21e6727a2d4aa33be
pdf-font-stream PDF embedded font (sfnt) at offset 0x137B7 10588 bytes
font_01_sfnt_off00014ff4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14FF4 16792 bytes
font_02_sfnt_off00016806.bin
65c2930fe57faec3c9bad6184d5e945441611ac98bb8aaeec8331d81e76c18c5
pdf-font-stream PDF embedded font (sfnt) at offset 0x16806 17144 bytes