Malicious PDF — malware analysis report

Static analysis result for SHA-256 b898be74a986ea9a…

MALICIOUS

PDF

90.9 KB Created: 2021-09-14 07:19:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 1682d82d93f0944732b31d457d9d774f SHA-1: e5954cabc581a3d061501707a1ff2f74fd26c204 SHA-256: b898be74a986ea9a811e36f0570705348350b41dd743746ef0b45cb5ce2c3670
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. The presence of numerous embedded links, many pointing to PDF files on different domains, combined with a 'download button' heuristic, suggests a phishing or social engineering lure. The document body is heavily obfuscated, preventing a clear understanding of its specific content, but the overall structure points to a malicious PDF designed to trick users into downloading further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9850

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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 http://www.amedna.com/userfiles/files/31835866682.pdf In PDF document text
    • http://krakowska98.com/zdjecia/fck/file/57743499850.pdfIn PDF document text
    • https://sieuthimaycafe.vn/uploads/file/61834893301.pdfIn PDF document text
    • http://gndpta.eu/news_objects/files/31826017680.pdfIn PDF document text
    • https://tlkingatlan.hu/kepek/other/file/bijabiseredewipaw.pdfIn PDF document text
    • http://namngonviet.vn/user-/files/45466629471.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/a88ccfad621b35655128e15dcd3572fb/kaweninefesujevufinoter.pdfIn PDF document text
    • http://www.gesas.it/media/mailinglist/file/memulomepopugemalesis.pdfIn PDF document text
    • http://yeosingol.com/FileData/ckfinder/files/20210908_5FCF70A807B344FF.pdfIn PDF document text
    • http://archi-m.ru/userfiles/file/rixufikaxulimu.pdfIn PDF document text
    • https://abicecream.ru/ckfinder/userfiles/files/84351024893.pdfIn PDF document text
    • http://chokmanee.com/userfiles/file/wisitufodimoruzemenoj.pdfIn PDF document text
    • https://anyimaker.com/upload/users/files/85847876340.pdfIn PDF document text
    • https://beauty-full.ru/uploads/files/vagisazaxarulilanodip.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/109b50a844e0f7d5773a3666d924a202/13645832409.pdfIn PDF document text
    • http://hemeringen.de/ckeditor_ablage/userfiles/files/1908563910.pdfIn PDF document text
    • http://w-f-l.de/user_img/file/nujepodijilasifegut.pdfIn PDF document text
    • http://cloverdiamond.com/file/rupuwotikemuf.pdfIn PDF document text
    • https://domilot.com/uploader/files/mozimaxuwaz.pdfIn PDF document text
    • http://trungnguyenjsc.vn/uploads/image/files/xuwifovupixosizojep.pdfIn PDF document text
    • http://wmc21.com/ckupload/files/werelofirezirekus.pdfIn PDF document text
    • http://hawaiisushi.iorderfoods.com/uploads/files/55356202469.pdfIn PDF document text
    • http://be-now.pl/userfiles/file/dijofoxirep.pdfIn PDF document text
    • http://ilturismoinitalia.it/userfiles/files/memomatebabijanunetilitol.pdfIn PDF document text
    • https://mehreganimaging.ir/images/upload/files/59042949423.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=hacks+simcity+builditPDF link annotation
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d104.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD104 10512 bytes
SHA-256: 573f7526a821756440b7133bc72efdd67399d45b90fa8df0a3732c5ad21d3786
font_01_sfnt_off0000e8f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F4 1848 bytes
SHA-256: 96f041f9bb06dd15345650b2bc0a735855b05dc10bf816b59c751a41180af06a
font_02_sfnt_off0000f1a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off000109b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109B3 24552 bytes
SHA-256: fc9468670f3ddf600e084cbccecf16a6dbe4d5b25432cfae1285736f9e065233
font_04_sfnt_off000147ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147CA 16164 bytes
SHA-256: a0f26d9ec2bc0bbc84dfb8c1a224a49f7f70479ac92e21d726acd811d43f3bd1

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