Malicious PDF — malware analysis report

Static analysis result for SHA-256 7be6060a5ef35eb8…

MALICIOUS

PDF

99.6 KB Created: 2021-05-11 16:21:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 006df14b145bda0a628f0f04da6049c5 SHA-1: 506ff06ff46b746343fa98a2bbf2b65a39a0f498 SHA-256: 7be6060a5ef35eb84784a84f1927ba065f6209da641bab14b43a44f1f4565b90
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, a common tactic for link farms designed to redirect users to malicious sites. Heuristics indicate a link farm on disposable hosting, and ClamAV detected it as Pdf.Phishing.Trojan. The ML classifier also flagged it as malicious with high confidence. The document body is heavily obfuscated and unreadable, but the presence of URLs and the heuristic firings strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://xajibur.ru/strik?utm_term=biblia+de+estudio+thompson+en+linea+gratis PDF link annotation
    • https://wirimodarezekas.weebly.com/uploads/1/3/5/3/135314182/e6ec15b6.pdfIn PDF document text
    • http://1xbets-reg.site/where_is_the_filter_that_tells_you_what_disney_character_you_look_likemcz8q.pdfIn PDF document text
    • https://wilogodomagifaw.weebly.com/uploads/1/3/4/7/134727865/dubapew.pdfIn PDF document text
    • https://cdn.sqhk.co/dilizilozok/5HXNLfy/ghosts_of_mars_movie_download.pdfIn PDF document text
    • https://cdn.sqhk.co/jemajujo/jd7igrn/ralphs_weekly_ad_preview_page.pdfIn PDF document text
    • https://cdn.sqhk.co/detazido/iahbheM/nitro_rc_trucks_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/kakumipoman/hvXeNha/kung_fu_panda_full_movie_hd.pdfIn PDF document text
    • http://hs-life.ru/how_to_turn_a_picture_into_an_oil_paintingnxgcf.pdfIn PDF document text
    • https://rudetotupolukoj.weebly.com/uploads/1/3/2/6/132681245/zuxukod-mugudopeto-gusirovemoga-nemimarazeji.pdfIn PDF document text
    • https://sekikeke.weebly.com/uploads/1/3/4/7/134739811/melosax.pdfIn PDF document text
    • https://pokadomefodifug.weebly.com/uploads/1/3/4/4/134478187/62442af6582e243.pdfIn PDF document text
    • http://twoup-viktoria.online/69945227017erxxb.pdfIn PDF document text
    • https://resodarapasak.weebly.com/uploads/1/3/4/6/134659305/vuvekeketojol-tulusi-nokipi.pdfIn PDF document text
    • https://labaveboto.weebly.com/uploads/1/3/4/6/134611097/6460826.pdfIn PDF document text
    • https://guxikotazo.weebly.com/uploads/1/3/4/7/134704652/xozorapasatotenu.pdfIn PDF document text
    • https://cdn.sqhk.co/goduwonon/j8fIZat/pidunedokumekenuwega.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1ec9b6e7-17eb-4e1e-a994-ba5ce4cbdb7c.filesusr.com/ugd/d4a9d6_963beeb07add48659a51c2c02a716b12.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/farefasejikap/jambox_mini_portable_speaker.pdfIn PDF document text
    • https://ba428ff1-d53d-4eb5-bdb2-cc960067f420.filesusr.com/ugd/7041e4_834ddeba221d47eeb54e61636436c198.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/napoledunadigo/six_sigma_white_belt_certification_free.pdfIn PDF document text
    • https://s3.amazonaws.com/fusopoxipo/izotope_insight_1_download.pdfIn PDF document text
    • https://s3.amazonaws.com/lunojol/axial_scx10_owners_manual.pdfIn PDF document text
    • https://09ec9d85-9312-4337-94d0-b84080e05f2e.filesusr.com/ugd/ac0094_019cf2e995574d788e25687159826bb8.pdf?index=trueIn PDF document text
    • https://a519209a-2b0a-481f-9fe9-460c873bdc80.filesusr.com/ugd/270e53_1093be9c3bd0462386d3b90ebd7ec29e.pdf?index=trueIn PDF document text
    • https://ab737b70-891a-4a1f-8db9-ee548211cb31.filesusr.com/ugd/ce14f3_642117331d124f749001a0d7af6461b2.pdf?index=trueIn 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000120fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120FD 5564 bytes
SHA-256: 8b2b4e43877e98072e369c78d6141ebd9d1d19188ee3c38b0c5f327224bd0fc6
font_01_sfnt_off000133ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133AE 3256 bytes
SHA-256: dae8cf0ef5109d7c9f98b545a1e714567686927cfdabbca3d9d2f0f14f9e98dc
font_02_sfnt_off00014154.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14154 12232 bytes
SHA-256: f417e8c953b1ec55f756015c00656f8da1fbfc8e8ce0673972fa03b4c00bfe12
font_03_sfnt_off00016878.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16878 16288 bytes
SHA-256: 8e307f067fa90fb420384c09fab1a6858b38cba8f46b1287e3106600375b7a32