Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3edb01b32d26c3a…

MALICIOUS

PDF

86.1 KB Created: 2021-09-20 13:46:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 810d506133bbe62d41b9ae23e4b2b723 SHA-1: 1b49d6ac49a78f120379b1eaa56ff78e9b2f0a9a SHA-256: b3edb01b32d26c3a3dae996d3649f1a917e99344d99ea5d270b1e506c79a601b
134 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of numerous external URLs, including one with a 'crack idm' term, suggests a phishing or malware distribution lure. The 'SE_DOWNLOAD_BUTTON' heuristic further supports the idea that the document is designed to trick users into downloading a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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 https://allytemp.ru/uplcv?utm_term=crack+idm+6.36 PDF link annotation
    • http://tienhasteel.com/app/webroot/upload/files/lufewi.pdfIn PDF document text
    • https://angkorphotographyguide.com/userfiles/file/63356044416.pdfIn PDF document text
    • http://schokofontaenen.de/idata/pirapugurujuz.pdfIn PDF document text
    • http://www.thaiboat.net/image/upload/File/tupimazidolu.pdfIn PDF document text
    • http://humanlitech.com/files/files/turis.pdfIn PDF document text
    • https://mokshadhamnepal.org/userfiles/files/69491294050.pdfIn PDF document text
    • http://lachina.cn/upload/file/174212229.pdfIn PDF document text
    • http://mirai-kankyo.com/userfiles/files/fititigozonu.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/1612fb93979c81---46526116460.pdfIn PDF document text
    • http://inciboya.com/resimler/site/files/63070663531.pdfIn PDF document text
    • http://cjcounsel.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/46792824228.pdfIn PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/ece890b0e267fec0a7cc3c8bb3db8ee5/jawasidabifokod.pdfIn PDF document text
    • https://workinhotel.com/upload/fckfile/27541325056.pdfIn PDF document text
    • https://tadimtursu.com/image/files/46590077809.pdfIn PDF document text
    • http://abarappresentanze.it/userfiles/files/58032688041.pdfIn PDF document text
    • http://yusungchart.com/userData/board/file/tutolilureziwenuzaxakajo.pdfIn PDF document text
    • http://scarpatti.com/files/98564044694.pdfIn PDF document text
    • http://nanobubblevietnam.com/uploads/userfiles/file/nutoso.pdfIn PDF document text
    • http://donauwell.at/userfiles/file/jixeninireda.pdfIn PDF document text
    • http://xn--80aer5aza.xn--c1acndkmcarx.xn--p1ai/ckfinder/userfiles/files/lubusenitag.pdfIn PDF document text
    • https://promise-land.com/upload/file/banifito.pdfIn PDF document text
    • https://psiakocky-potisk.cz/webpagebuilder/ckfinder/userfiles/files/84234431191.pdfIn PDF document text
    • http://www.nagsa.es/ckfinder/userfiles/files/36850940294.pdfIn PDF document text
    • https://vanrun-it.nl/userfiles/files/novetixijono.pdfIn PDF document text
    • http://cassotech.nl/site/data/ws/files/30459264717.pdfIn PDF document text
    • http://zkqzl.com/uploadfile/file///2021091514301762.pdfIn PDF document text
    • http://tonerihned.cz/userfiles/file/38051976380.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_off0000e9c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000101d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101D4 19020 bytes
SHA-256: 3e1680463e83fe50cf029743267c95df9a53176d18eb86bb330b0ce9fad93b12
font_02_sfnt_off0001333e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1333E 10392 bytes
SHA-256: b07003b9c75951df31df5bcf3b814c50e026cae33810f7667c71df1d1f53b5a6