Malicious PDF — malware analysis report

Static analysis result for SHA-256 027c5554e271a440…

MALICIOUS

PDF

92.0 KB Created: 2021-02-12 19:09:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 7398e2cc40b6dfe7c227a99aad0d595e SHA-1: b7a9aacc697867a6dff0056cd96a521ae45d2e48 SHA-256: 027c5554e271a440a0b143e3f54d395aa92e2edb404cad8dc8ddb12172ae3019
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, many of which are generated to appear as SEO content, a common tactic for link farms and phishing. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to lead the user to download potentially harmful content from the listed URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://leonvi.ru/wix?keyword=celebrity+voice+changer+premium+apk PDF link annotation
    • https://cdn.sqhk.co/zogobadakedu/Cjjwhaj/memubujevoduterires.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409114/normal_5feea1bc4601a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448558/normal_601d3def4ab58.pdfIn PDF document text
    • https://tudadakamoziv.weebly.com/uploads/1/3/4/5/134596668/kogixipirotujigi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380858/normal_600114debab90.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384048/normal_600b6d936e594.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419194/normal_5ffa78cf5194a.pdfIn PDF document text
    • https://cdn.sqhk.co/mogezunir/fNgiGic/tiny_worlds_app.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477386/normal_5fede16e4552d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414849/normal_5fd08339a78b0.pdfIn PDF document text
    • https://cdn.sqhk.co/vujagefamig/2etSSaE/tofaguremukejosipubo.pdfIn PDF document text
    • https://cdn.sqhk.co/lefuwaregew/jhPPZMH/17914277478.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496151/normal_6017602c5a7fa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/remavuj/cannot_format_cf_card_canon_40d.pdfIn PDF document text
    • https://s3.amazonaws.com/paropabaru/bkav_pro_2017_full_crack.pdfIn PDF document text
    • https://s3.amazonaws.com/wenobagupexekap/barossa_council_annual_report.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/tefodokexexodixarapavalen.pdfIn PDF document text
    • https://s3.amazonaws.com/tazopaju/free_inferencing_worksheets_2nd_grade.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8BD 6676 bytes
SHA-256: eb818d908f85100d3a99250672f03864bcbe34b2514f2b59354f321a79477503
font_01_sfnt_off0000e990.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE990 5440 bytes
SHA-256: e1577c3c414c6c1b5985ec199d6662a6e6b5513df193b79a7a4b6fc32a750349
font_02_sfnt_off0000fbe7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE7 6032 bytes
SHA-256: 5abb0e38c376ea13af7e7de8bd039f50f32ec785f56f4164890a9ba55d609282
font_03_sfnt_off00011098.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11098 10624 bytes
SHA-256: 4c5f973931ae698e4037850a6f60d66f8dc51a8a46806399307051987815d568
font_04_sfnt_off00013519.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13519 16388 bytes
SHA-256: 333f39dabf5095a0add046da09adfd509675ba2d35620fc4d0b7666682cc8fc9
font_05_sfnt_off00014afe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14AFE 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
font_06_sfnt_off000158b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x158B0 1736 bytes
SHA-256: 1648accd5638f26481c437d0e436fdfb03edab78dab75f4e73239278c8cddc19

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