Malicious PDF — malware analysis report

Static analysis result for SHA-256 062c0e30f0041ea1…

MALICIOUS

PDF

68.7 KB Created: 2021-09-26 22:48:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: ded68930da8359bfb2deafe88bda4395 SHA-1: 56d7c524d7dfd61994d1924b06252978ebab008b SHA-256: 062c0e30f0041ea176dc782eccdaeda17020bf283947c78ff090049f32e04566
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by multiple heuristics as malicious, including a high-severity rule for random URL links and a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains a large number of external URIs, many pointing to disposable domains, indicating a likely phishing or redirection scheme. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics suggest the PDF is designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://crysiq.ru/uplcv?utm_term=free+pokemon+silver+download+for+android PDF link annotation
    • https://keongracun.org/contents/files/38912249222.pdfIn PDF document text
    • http://herbwaterthailand.com/userfiles/files/tegirozol.pdfIn PDF document text
    • http://ijfbacknumber.org/editor_up/39252820807.pdfIn PDF document text
    • https://mbzgogo.xyz/web/img/podborky/files/1585099559.pdfIn PDF document text
    • https://hijaustabilo.com/contents/files/memijijepamikudof.pdfIn PDF document text
    • https://nhatthiengroup.com/files/uploaded/files/564942538.pdfIn PDF document text
    • http://ambulatorioveterinariobubiniregini.eu/userfiles/files/51657002280.pdfIn PDF document text
    • http://www.yemany.com/yemfiles/files/sarobujebixigabixi.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/judimalaxunetakadadika.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614719946f750.pdfIn PDF document text
    • https://anitt.in/ckfinder/userfiles/files/labifomekijetubef.pdfIn PDF document text
    • http://chinalabware.es/d/files/pabowam.pdfIn PDF document text
    • https://amoslodge10.org/ckfinder/userfiles/files/ximiwobevogavesupalorepu.pdfIn PDF document text
    • https://ms2gacor.com/contents/files/38976170784.pdfIn PDF document text
    • http://xn--80aaaghhaztbcd1agjgbccsgfftf.xn--p1ai/pict/file/xujilumawubitixujifoxida.pdfIn PDF document text
    • http://dayuntang.com/assets/uploads/ckedit/files/20210913145612.pdfIn PDF document text
    • http://enidental.com/userfiles/file/20210907164443.pdfIn PDF document text
    • http://vivaibonomo.it/userfiles/files/sofijoxitepirenadir.pdfIn PDF document text
    • http://irina-beha.com/ckfinder/userfiles/files/kiloxurerenusetorugoben.pdfIn PDF document text
    • http://www.contectrade.hu/fckfiles/file/dakab.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b76579acd6---zanodibe.pdfIn PDF document text
    • http://kartywspomnien.pl/uploads/assets/file/62860435945.pdfIn PDF document text
    • https://bedandbreakfastchia.it/userfiles/file/19417158677.pdfIn PDF document text
    • http://candleelectricals.com/uploaded_files/userfiles/files/tubelitebofod.pdfIn PDF document text
    • http://hertzlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/rukeremuwotasu.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_off0000b021.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB021 14368 bytes
SHA-256: b295923c201a3a9359913f7564dbbb1f1032c93a4ae225cabee184abeecec656
font_01_sfnt_off0000d443.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD443 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ec5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC5A 10784 bytes
SHA-256: 4e87fae44bd391668515e166729a31736789c6270a27af43e7f0c6078a1789a4