Malicious PDF — malware analysis report

Static analysis result for SHA-256 9849be5b8399884e…

MALICIOUS

PDF

92.5 KB Created: 2021-09-09 21:12:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 9e38fb06d80c3bdaed9da422ec84b0d4 SHA-1: 00fee64aa36ef3682c3f1d2bd12f0c67a9201177 SHA-256: 9849be5b8399884e84efb53e8cd923a89fffb9de5319efd8d8d8fe2785cfa548
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV detection, indicating malicious intent. It contains numerous external URLs, suggesting it acts as a lure to redirect users to potentially harmful websites. The PDF structure and embedded URLs point towards a phishing or malware distribution campaign, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 5

  • 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.
  • 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://infrive.ru/uplcv?utm_term=best+android+tv+apps+not+in+play+store PDF link annotation
    • http://avvocatoandreabruschi.it/userfiles/files/mobejo.pdfIn PDF document text
    • http://benetworkingpro.com/ckfinder/userfiles/files/16547571217.pdfIn PDF document text
    • https://elsa-daulte.com/ckfinder/userfiles/files/76260074992.pdfIn PDF document text
    • http://schturman.ru/files/files/56308942203.pdfIn PDF document text
    • http://servicedental.it/userfiles/files/324752308.pdfIn PDF document text
    • https://emilline.dk/ckfinder/userfiles/files/73253915062.pdfIn PDF document text
    • https://www.pepinieres-gey.fr/ckfinder/userfiles/files/91882002266.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130cbf64f40a---4796703164.pdfIn PDF document text
    • https://euro-m.si/web/dokumenti/file/fufuwovurumame.pdfIn PDF document text
    • https://a1-recruitment.fr/v2011/Files/fck_upload/file/gudowobixebimejifaxomat.pdfIn PDF document text
    • http://grandviewgroupresort.com/upload/files/76416382173.pdfIn PDF document text
    • http://shijijiaming.cn/filespath/files/20210905183104.pdfIn PDF document text
    • http://huanghels.com/filespath/files/20210902232423.pdfIn PDF document text
    • https://fleschimmo.lu/userfiles/files/sufevumamawuxukoj.pdfIn PDF document text
    • http://iaestedresden.de/userfiles/file/1886854003.pdfIn PDF document text
    • http://xn--80aab8aioy.xn--p1ai/userfiles/file/gemojisokasasume.pdfIn PDF document text
    • http://www.accl-calibration.com/login/ckfinder/userfiles/files/73594199007.pdfIn PDF document text
    • http://iucecb.com/files/file/48933832627.pdfIn PDF document text
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16131656daf037---19268241722.pdfIn PDF document text
    • https://narellesastro.com/userfiles/files/werepelekakupewisegav.pdfIn PDF document text
    • http://safedoorsystems.com/cmsimages/file/zajomokuzapelesobuboboli.pdfIn PDF document text
    • http://biirbeh.mn/images/content/file/zeziletos.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_off000104a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104A1 18260 bytes
SHA-256: b15aa966d205b9c71faeb4022c9b09d8b338b9ff99294121dac2f3fd05eae5fc
font_01_sfnt_off000133b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133B9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014bd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BD0 10620 bytes
SHA-256: 159a507cadefbab92da1d3ad05fcd5ee3820015394243fc9698a069a4de9ed17

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