Malicious PDF — malware analysis report

Static analysis result for SHA-256 987710e360e9393f…

MALICIOUS

PDF

83.8 KB Created: 2021-09-22 09:12:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: d67ed62634c8b45063781832a3e733e0 SHA-1: 7ef2391345a7fb65c8f6ed44a9ccccad0d126fad SHA-256: 987710e360e9393f360283181e8e7cd55edc4ffb1bbc2086aebe11c4515a9122
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and multiple external URIs, indicating a malicious intent to redirect the user. The ML classifier and ClamAV detection strongly suggest this is a phishing or trojan delivery attempt. The presence of JavaScript points to its use for executing malicious actions, likely to facilitate the download of a second-stage payload from one of the provided URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://philabc.ru/uplcv?utm_term=family+island+cheat+codes+android PDF link annotation
    • http://malir-naterac.info/UserFiles/File/duwotolajanejizubil.pdfIn PDF document text
    • http://ladispensadicampagna.it/uploads/assets/file/tilegefilewa.pdfIn PDF document text
    • http://ebd.su/UFD/7623/files/19357185569.pdfIn PDF document text
    • http://dbcasagayathottam.org/assets/uploads/cms_images/files/difisorudabodot.pdfIn PDF document text
    • http://kurumakaitori-one.com/js/upload/files/60979619603.pdfIn PDF document text
    • http://www.galiantsolutions.com/emailimages/file/28692121138.pdfIn PDF document text
    • http://youandisagenix.com/ckfinder/userfiles/files/zisetodotuvale.pdfIn PDF document text
    • http://airsoft1.ro/files/file/xofuxatowav.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/161466fd612953---nuwasujikugebiburikiduvad.pdfIn PDF document text
    • http://ntep2008.com/UserFiles/File/80026594557.pdfIn PDF document text
    • http://studiocinti.eu/userfiles/files/29900314538.pdfIn PDF document text
    • http://rqconsultores.com/userfiles/file/puladunuke.pdfIn PDF document text
    • https://www.pelicanfinancialnetwork.com/ckfinder/userfiles/files/tekofazovon.pdfIn PDF document text
    • https://imotrading.com/images/userfiles/36192247377.pdfIn PDF document text
    • http://chretkinia.pl/userfiles/file/56954221810.pdfIn PDF document text
    • https://gesema.com/UserFiles/file/3435836057.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f5d9797e3d---28192123410.pdfIn PDF document text
    • http://akinmedikal.com/uploads/file/koxudunujakabutediledi.pdfIn PDF document text
    • https://yifff.se/userfiles/file/vaxekofopazikufojokenerit.pdfIn PDF document text
    • https://nidi.mk/ckfinder/userfiles/files/nugegutelo.pdfIn PDF document text
    • https://vsetinrally.cz/userfiles/file/pulijuzamenijidipik.pdfIn PDF document text
    • https://pelletier-tp.fr/ckfinder/userfiles/files/17310898369.pdfIn PDF document text
    • http://hoteldarim.ir/basefile/hoteldarimir/files/12839766491.pdfIn PDF document text
    • http://netichikawaya.com/userfiles/file/xajipuwudufurozat.pdfIn PDF document text
    • https://mimpiindah168.com/contents/files/15984568875.pdfIn PDF document text
    • https://ohcsi.com/ckfinder/userfiles/files/25887734735.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_off0000e334.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE334 17732 bytes
SHA-256: ad065802de7791bf782302a49fdccc4bef398bd9bc4f94e89d5f485d0df80218
font_01_sfnt_off0001114d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1114D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012964.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12964 10724 bytes
SHA-256: cddffb4cee09e3473452ae78f48470eb7c390b9aa0d002189758148e3af0a7c8

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