Malicious PDF — malware analysis report

Static analysis result for SHA-256 65f451be2bdff96f…

MALICIOUS

PDF

91.7 KB Created: 2021-06-29 09:44:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 214575b2715f3a60bf7819d8d6f863b6 SHA-1: a56ac681dc4f97ebd355cfca662f8c93da4d444a SHA-256: 65f451be2bdff96f5a5ad8326cce9b433f85e543de020cba9a810bcd0698cc04
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. Numerous embedded links, many pointing to compromised WordPress sites, suggest a phishing or malware distribution campaign. The document body is heavily obfuscated and contains no readable text, indicating it is not intended for user interaction beyond clicking the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bfd8580cec5---sopenexoroxakabaperajumum.pdf
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/da95fc5a2b7628ff089c191c7f92e5b8/lodopativesebopanalafeko.pdf
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609b70290c2c0---wugikafukozigakepig.pdf
    • http://best-infosystems.com/userfiles/file/39269143589.pdf
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f00c1c7d8a---12272578158.pdf
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/0774998a439e0524d92bff11effd3e44/sejasokavasevinazafa.pdf
    • http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/b12fe5640c97d9c6edbfeba5dd6f82a9/61323592043.pdf
    • https://archltginc.com/wp-content/plugins/super-forms/uploads/php/files/2e33fe214dd7a91900dcfc181a77ff42/wovulumeguwi.pdf
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/u69mbdcs66o519u43m0mo82v22/lareno.pdf
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/2nrlm1uni2auuqcnpk7nmqfnbe/malipevofubuj.pdf
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d875d167c0d---xuwufisujexematufizudi.pdf
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c97414a1e16---vukeduzupezenem.pdf
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/160be80324c990---24279305892.pdf
    • https://hotel-la-licorne.fr/userfiles/file/buvaba.pdf
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c392e337065---7408385018.pdf
    • http://orosweb.hu/ckfinder/userfiles/files/nixavuwupefigatokufuj.pdf
    • https://careersourceokaloosawalton.com/files/public/wamipogisesen.pdf
    • http://elazentrale.de/images/uploaded/file/18369442590.pdf
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b426649bb01---64758354811.pdf
    • http://progettarecasa.com/userfiles/files/11684757641.pdf
    • https://tylbm.com/Upload/ckeditor/files/memalesovulog.pdf
    • https://firmacorretajeschile.cl/upload/file/9066383276.pdf
    • https://genesislighting.net/wp-content/plugins/super-forms/uploads/php/files/05fc4d3a1a1b60c78f9ddde29b383782/96510939114.pdf
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a89c9ac0cbc---12235469531.pdf
    • https://encoregallery.us/wp-content/plugins/super-forms/uploads/php/files/75e2e7bdb22ed3cf8279dd079c397655/68738335868.pdf
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/88fa07f32bf630686209ad4412a37ef9/vowuf.pdf
    • http://sbox-technology.com/upload/datoteke/foxageponagadu.pdf
    • https://hfdjet.com/wp-content/plugins/super-forms/uploads/php/files/5e19eeafcbe221f9c0f389f734856dea/49943833477.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=baby+poops+before+birth
    • 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_off00010532.bin
655ac8c0a5b53f3cb7a3f13023e366f349ab42c0bb541400df36718c1fdc1f1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10532 17012 bytes
font_01_sfnt_off0001310f.bin
ca7ba11ee2f205a0c7c761f301434b85ce7e2a5e16e33c533eeaadffad2bc7cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1310F 10612 bytes
font_02_sfnt_off0001495b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1495B 16792 bytes

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