Malicious PDF — malware analysis report

Static analysis result for SHA-256 f70d9298248af66a…

MALICIOUS

PDF

88.7 KB Created: 2021-07-30 20:42:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: b0443a7a3d7691aef160f2fe36c5f20a SHA-1: 3d70d5b362313bc1ce671661b788950e10ff6fca SHA-256: f70d9298248af66aadec5eed0632bfc2047f8043ae0516ffff02759e9c23a387
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URLs, many of which point to compromised websites or disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a common technique for executing malicious code within PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

Heuristics 7

  • 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.
  • 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 https://garglob.ru/uplcv?utm_term=is+apple+watch+5+waterproof+without+water+lock PDF link annotation
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608a3d6701799---34964206503.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/ac27bf43d80504a57cb852ae423c0c49/vuzes.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c5b5967fb3b---xibafakanenejunawis.pdfIn PDF document text
    • https://austdoorcaocap.com/upload/files/7264378921.pdfIn PDF document text
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/5d803aaf2c20d776438bb9f7a6b0767e/94005471401.pdfIn PDF document text
    • http://everbeenmagnet.com/js/upfiles/files/vivij.pdfIn PDF document text
    • http://studiorinaldibedin.eu/userfiles/files/ritasijisevomuberuminu.pdfIn PDF document text
    • http://bioterapiazabiegi.pl/obrazy/file/15570012924.pdfIn PDF document text
    • http://mlsy.cz/images/file/files/faxonavezik.pdfIn PDF document text
    • http://hotechike.com/files/files/nexepabefo.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/c2aa6738fd39179ee7905325159f224f/denenesajomitax.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607587c1149fc---76840965145.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/kinukebawi.pdfIn PDF document text
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/5l074ftlisijet4qviv2ks19e6/makizuzavuzixovewidi.pdfIn PDF document text
    • https://atlastoursntravels.com/userfiles/file/rasokosixivofafot.pdfIn PDF document text
    • http://packturf.fr/files/54471230502.pdfIn PDF document text
    • http://fresh-j.info/images/uploadedimages/file/fomoredupuxegab.pdfIn PDF document text
    • https://dcoderesearch.com/uploads/lezinibogadutiz.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/fffeaef2d2be2a526e947cae1ab87dca/78553346694.pdfIn PDF document text
    • https://shoppingplanet.ro/ckfinder/userfiles/files/8743700425.pdfIn PDF document text
    • http://awkontrakt.pl/ckfinder/userfiles/files/bepogojawedagekazenava.pdfIn PDF document text
    • http://karinameal.com/imgdish/files/40629259705.pdfIn PDF document text
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/bh74qad3n6po2np67sl5sfbk00/dawubixigevedewuruvidi.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b2f887f0622---baduzoripobebopamoxuzopi.pdfIn PDF document text
    • 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_off0000f324.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF324 17344 bytes
SHA-256: 29aeb4ba65ebbcdeb5f57dc570337df9a88cd709d6f0adbe629d82ad10f128e3
font_01_sfnt_off00012080.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12080 10836 bytes
SHA-256: 5c7d869281c64dea32cf39c06e23d9d411cab0d47f056aeab22276e891371454
font_02_sfnt_off000139c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139C7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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