Malicious PDF — malware analysis report

Static analysis result for SHA-256 0956f86ec91962b5…

MALICIOUS

PDF

80.1 KB Created: 2021-09-03 10:29:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 8452ada511cc5dffae153abe9383294b SHA-1: 625a9dea044d38d99fe1acef969bcade0d6719bb SHA-256: 0956f86ec91962b57c12c99213cfbabae08452fc0d6023d1862ddceddbbbb89c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to potentially compromised websites, suggesting a link farm or phishing lure. The PDF structure and embedded URLs are indicative of a spearphishing attachment, designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 http://hzjksj.com/images/upload/File/2944062704.pdf In PDF document text
    • https://abouelhoulgroup.com/userfiles/files/xofadaduvepusemo.pdfIn PDF document text
    • https://dienlanhbachkhoa.info/upload/files/37051701903.pdfIn PDF document text
    • http://uni-farm.pl/ckfinder/userfiles/files/66188129182.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/fccea371fa114d27ab68b2f22dd56d2a/sazeluvaguvigub.pdfIn PDF document text
    • https://ofertaromania.ro/ckfinder/userfiles/files/jozaluret.pdfIn PDF document text
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/k6p3nsq9g56dgr96qn0tnabkv8/40357670642.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160f8178f09639---891359857.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607867992abde---gumunimemevizaviw.pdfIn PDF document text
    • https://www.plsok.com/wp-content/plugins/super-forms/uploads/php/files/b733a91eee751cc35c2786b274daf9c9/86437620337.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/6a58040f1e3aea3e479fd48e711d2a08/88429342630.pdfIn PDF document text
    • http://staractivecollection.com/resimler/site/files/zawesedejifikegowoko.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/1b6272473b86b571e2758dcde90eafb5/jozekipanofiresile.pdfIn PDF document text
    • http://www.lebedosapartotel.com/data/yukle/files/25551494012.pdfIn PDF document text
    • http://easyreturn.store/userfiles/file/metidatodewowupabiwubawus.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/a0a1d1176cbb0abb3afb8953b2ebc7a6/46851934998.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/a23a809749c129528cd80809552c9b94/68860610145.pdfIn PDF document text
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/f9673f0e138c27bef7819745c2e61e42/pemusosupekakilifuvenig.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/4f9da4a36e8e2777f361b5fe4521bf44/sedoxelukomijorun.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1609f994d450ad---duzufixutekisodevug.pdfIn PDF document text
    • https://rivieresoceanie.com/ckfinder/userfiles/files/sagamiribipe.pdfIn PDF document text
    • http://first-group.kr/ckupload/files/denadudiwadesevitezema.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/2fd8da882fd578e2c02afa8639177080/24397294716.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607893e62470a---bupaful.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=cuba+travel+guide+lonely+planet+pdfPDF link annotation
    • 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_off0000d3cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3CD 17568 bytes
SHA-256: dc9938669657918ee102611011cc1d34c9d16dd1b6aba9690f7901f6752d0ae7
font_01_sfnt_off00010120.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10120 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011937.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11937 10956 bytes
SHA-256: feed94883fdbc94c3b977709fc4a2232baab216d1b66a04cf1cd087fa754b74a

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