Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c7fca27cdc5ea80…

MALICIOUS

PDF

77.5 KB Created: 2021-04-06 15:32:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8b5dbe69d99fede7ba9490fa77c174d6 SHA-1: 7a3414388948a5ac75468c0445e782e3ca99d3b1 SHA-256: 6c7fca27cdc5ea80cde5430f3c202f7ba2d8879e458d8d8cf8f3b5c178552fe9
164 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for phishing and malware distribution, as indicated by the 'PDF_SEO_LINK_FARM' and 'PDF_URI' heuristics. The presence of a 'SE_DOWNLOAD_BUTTON' heuristic further suggests a lure to download content. ClamAV detection and ML classification confirm the malicious nature of the file, likely a phishing attempt or a downloader for further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://dafemum.ru/wix?keyword=driver+genius+pro+20
    • http://creditstar-kabinet.com/lean_canvas_editableeso2q.pdf
    • http://instahelpforbusiness.com/satanas_libro_mario_mendozacv80r.pdf
    • http://parujom.iblogger.org/34444232815.pdf
    • http://floradoma.net/doxomobifafalilab10eg.pdf
    • http://golosa-spasibo.ru/mokuvixurerakovisofiwuvinqau.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://ef5e9b3f-1a8e-4c79-9b60-34b8f8133c96.filesusr.com/ugd/18574e_46d4805686b742e78a678eca97875add.pdf?index=true
    • https://58eafb2e-ea74-4523-a1b2-d2e0fe9bfe54.filesusr.com/ugd/466fa0_11ad7ae25f264c28a2e731fdaf9c2b9c.pdf?index=true
    • https://7ef5d8b8-74ac-4e0a-b0a0-fa61ca6462a8.filesusr.com/ugd/23e9be_1545e9fffc9c4364b49159f8ac6e17c0.pdf?index=true
    • https://s3.amazonaws.com/jasadavebaga/gapedisoxedube.pdf
    • https://091a8774-b5bd-4fb7-8799-8d1ca0ca44ad.filesusr.com/ugd/8716ab_4997fe64e2ed483eb741e9f1ffd549bb.pdf?index=true
    • https://s3.amazonaws.com/kavalukato/sexadat.pdf
    • https://s3.amazonaws.com/lovetijif/84256322363.pdf
    • https://s3.amazonaws.com/gelawiweza/the_mortal_instruments_city_of_bones_2013_www.khatrimaza.org_720p_esub_blur.mkv.pdf
    • https://s3.amazonaws.com/jepinebawo/angel_has_fallen_free_mp4.pdf
    • https://s3.amazonaws.com/kudufigunabi/52898770023.pdf
    • https://bcd7deca-fd5d-492b-a220-d373ca515bc9.filesusr.com/ugd/12f4eb_08983ab713e94e77a353575584864a31.pdf?index=true
    • https://cb6d8354-940b-4e05-9f1d-0150973ab277.filesusr.com/ugd/882da0_b18d94659ca4458c876ff9f80635d4ab.pdf?index=true
    • https://s3.amazonaws.com/kizugokofo/46442971598.pdf
    • http://tekonudobigu.rf.gd/85279590959.pdf
    • https://s3.amazonaws.com/wetevali/82018850976.pdf
    • https://s3.amazonaws.com/xujitezu/catalogo_hinode_ciclo_3_2018.pdf
    • https://06ebba1c-c738-45d4-b58d-83edbdcc9420.filesusr.com/ugd/b14caa_2d4f11fbd77d4cc5abe8ad8ee8682be0.pdf?index=true
    • http://xamusewegelaru.rf.gd/software_quality_assurance_engineer_resume.pdf
    • https://6afed14e-2b01-442b-8c2e-11a8a6f39965.filesusr.com/ugd/46a5ae_88b94d20dbb842ecbf9b4bb7a11420b5.pdf?index=true
    • http://polexusuzoxofiw.epizy.com/sagovoruxixadunupetedi.pdf
    • https://s3.amazonaws.com/bomifabipi/xetusimuxigudubu.pdf
    • https://1a73feee-b327-4bc5-ac54-9d367b44a425.filesusr.com/ugd/226baa_293b35f3bc1042f8a04d42a31cc31ff5.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f156.bin
0f94b34a3104b67b9139bdd0dfaf886185ad27de35290f2ec09be7a2d1fc98b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF156 5076 bytes
font_01_sfnt_off000102c7.bin
e41afddeb3ee4aac0e08d536a52a0a23025f767899a8b02105c78a0dbbe48da4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102C7 11036 bytes

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