Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4662cacd2bc6033…

MALICIOUS

PDF

99.5 KB Created: 2021-08-08 10:09:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 214eb4faab3da3919cb850b017506893 SHA-1: 6524eec16075b353d21e936c106b0df61abbffb7 SHA-256: f4662cacd2bc6033b55e3b59635cceda39635154c7c5be46c37a6182ea91f874
176 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The document contains numerous embedded URLs, many pointing to compromised WordPress uploads and disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of these links and the overall structure strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://ajitcoatings.com/uploads/9069087939.pdf
    • https://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/0b5f00cea0eceb1dc276d2057902fc8c/beboxonewelofabokewi.pdf
    • https://athensviptour.com/wp-content/plugins/super-forms/uploads/php/files/1aeac31c39a77424078677f67527d56f/66293739393.pdf
    • http://tverzhilservis.ru/foktver.ru/ckfinder/userfiles/files/20494279124.pdf
    • http://constantcontinuity.com/membership/data//files/1094337879.pdf
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/57763852707.pdf
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e1ae09c767---16540892183.pdf
    • http://cuatudongsaigon.vn/uploads/files/42227298647.pdf
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/cdd4frhihe7gc45jr781kq6f6k/kusekurudedudafik.pdf
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/514f25fa4646466807d1a64249dd0187/tapijam.pdf
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608ad439e9c47---37476948502.pdf
    • https://www.basur-tedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160700bdd35f57---kigakidojejilidafigas.pdf
    • https://nutritie-metabolism-sanatate.ro/app/webroot/files/userfiles/files/rinoja.pdf
    • http://fitnessklub-impuls.pl/uploads/assets/file/18748209517.pdf
    • http://www.anieliasfx.com/uploads/textareas/file/kizesawapuremobesubopite.pdf
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4fe0e7735---38434969097.pdf
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/f32a1689d6b96ce14105c5440a1075ce/jusesuviri.pdf
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ff8147144b1---99409026735.pdf
    • http://fizjoactiv.eu/Upload/file/rabapugozibinewezegeri.pdf
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/16083ef00738dd---xobujutege.pdf
    • http://banglatalkies.com/dynamic-images/cms/file/kapinixe.pdf
    • http://szao-spb.ru/images/news/file/jubuzozanukuvojuwabitofu.pdf
    • http://riggi.ru/userfiles/file/11166906148.pdf
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160824e61c9b3a---marusimovoferar.pdf
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/161089bd43ffb3---5580505518.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=can+covid+vaccine+cause+brain+fog
    • 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_off0001219e.bin
56f61e6d99c2fcb8bf4adb0786aa803aeb72b01bd734088b3ed2b6ce476cb022
pdf-font-stream PDF embedded font (sfnt) at offset 0x1219E 10844 bytes
font_01_sfnt_off00013a9e.bin
bcbff9b87c2d4a0917a998373d381e2375f1c69a4f221269f8eb12822f13aefc
pdf-font-stream PDF embedded font (sfnt) at offset 0x13A9E 17184 bytes
font_02_sfnt_off00016799.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x16799 16792 bytes