Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9b5ce7593a7bb47…

MALICIOUS

PDF

99.4 KB Created: 2021-05-11 00:44:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: b84e22f108f02695267a9e3a00d65a4a SHA-1: a77f5ee00d6f73a91f8e10bb297bebd4bb1c238d SHA-256: c9b5ce7593a7bb47d4b964b42ac07f5c6b50bf982ec2cd2578c5cca028867413
136 Risk Score

Malware Insights

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

The PDF contains an external URI and an image lure that redirects to a phishing site, as indicated by the 'PDF_SEO_UTM_REDIRECTOR_LINK' heuristic. The ML classifier and ClamAV also flagged this PDF as malicious, suggesting a phishing or trojanized document. No scripts were extracted, but the presence of obfuscated content and multiple embedded URLs points towards a malicious intent to lure users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://vilenefex.ru/strik?utm_term=islamic+names+dictionary+tamil PDF link annotation
    • http://kompledom.com/8756722561fxc9n.pdfIn PDF document text
    • https://cdn.sqhk.co/tajixixejafi/ihgizM6/christmas_nail_art_stickers_uk.pdfIn PDF document text
    • https://cdn.sqhk.co/rufopunuk/qNQljhG/mega_millions_pa_lottery.pdfIn PDF document text
    • https://cdn.sqhk.co/tovipovo/ie0id40/pixlr_express_photo_editor_online_free.pdfIn PDF document text
    • http://saxefitipar.iblogger.org/91787202045.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387037/normal_5ff345cc3653c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369788/normal_6051665a39de2.pdfIn PDF document text
    • http://reawolt.online/moxikatugujotaxusenawoz9bji2.pdfIn PDF document text
    • http://mbfsopg.com/fesezesepv828.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403408/normal_6021f96758cfa.pdfIn PDF document text
    • http://wotamojami.22web.org/musiwolubag.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://s3.amazonaws.com/wefemabeni/xepigejuperikimizegego.pdfIn PDF document text
    • http://rapuziba.epizy.com/systematic_desensitization.pdfIn PDF document text
    • https://s3.amazonaws.com/tonemakopinibem/ezgo_txt_48_parts_manual.pdfIn PDF document text
    • http://nolukufanalo.epizy.com/nowozadajum.pdfIn PDF document text
    • https://s3.amazonaws.com/sobaketemu/demogukalukuxexufomawujuv.pdfIn PDF document text
    • http://fabevurubojob.epizy.com/pretty_little_liars_series_1.pdfIn PDF document text
    • http://segidamilezuv.epizy.com/19833834349.pdfIn PDF document text
    • https://s3.amazonaws.com/dozore/24915058055.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://scripts.sil.org/OFLIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn 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_off0001082a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1082A 5124 bytes
SHA-256: 9d843ab3fdd08eccbf21df5b52b386c4d0b23b56571b8c5a3fb0576984fe8f79
font_01_sfnt_off0001197e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1197E 5016 bytes
SHA-256: 404b63577d562337ff9eb5b71197cb7f94af91b4f15b758fea1e0f865c027333
font_02_sfnt_off00012957.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12957 6068 bytes
SHA-256: 58b4873d33ac9fffaf45ed1a2312b8eb5fadf3b067e77f8cfe9e87095f6a7717
font_03_sfnt_off00013908.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13908 11712 bytes
SHA-256: ffe216d19c5444595d5fed60cbe9e96a19ceacf249ed2b4fba80e36c88e758d7
font_04_sfnt_off00015ff6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15FF6 19340 bytes
SHA-256: 42959f1e54a0c17c294c7ec15dde73893df041d24822398f8482171bbb4062cb