Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d4971a1b1f75a9e…

MALICIOUS

PDF

66.6 KB Created: 2021-03-22 19:52:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 387127054c4f8aada394b28565a18aef SHA-1: 335f12360d51a13e587619df14c5eae853724353 SHA-256: 3d4971a1b1f75a9ef9a0092f883533e5f9b85947573c3839208450e8f039c228
154 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of external links, many of which point to potentially malicious domains. The presence of a link farm suggests an attempt to manipulate search engine results or redirect users to malicious content. The document body is heavily obfuscated, preventing a clear understanding of its specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9227

Heuristics 4

  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://botokaw.ru/aws?utm_term=jlab+go+air+one+earbud+not+pairing
    • https://jukorupojos.weebly.com/uploads/1/3/5/3/135344641/fukurexoleni_jeguneribipiz_sanuxorawira.pdf
    • https://cdn.sqhk.co/kujusiru/yjbZcja/xagon.pdf
    • http://fesumebujurasa.22web.org/36429373098.pdf
    • https://cdn.sqhk.co/bupewazadufa/Gjg8ESE/descargar_lawnchair_2_pro_apk.pdf
    • http://soribowunalosu.22web.org/kiwisup.pdf
    • https://sogifeni.weebly.com/uploads/1/3/2/7/132712483/85ca29b1a0ee.pdf
    • http://jirobanu.22web.org/agro_informatics_definition.pdf
    • https://cdn.sqhk.co/kijowevo/PhdtAcB/thiwanka_dilshan_ekamath_eka_dawasaka.pdf
    • https://cdn.sqhk.co/fixikumeboga/TagjfdS/65859172683.pdf
    • https://cdn.sqhk.co/puxedimuwo/iijbwhb/hidden_object_pictures_for_adults_printable.pdf
    • https://fubexomufepa.weebly.com/uploads/1/3/4/8/134850999/7474488.pdf
    • https://somotudodij.weebly.com/uploads/1/3/4/6/134699902/vopur-pametimoles-fujexix-deluvetidu.pdf
    • https://bevufifebuseve.weebly.com/uploads/1/3/1/8/131855995/5927842.pdf
    • https://cdn-cms.f-static.net/uploads/4415768/normal_6031fb18389ec.pdf
    • https://cdn-cms.f-static.net/uploads/4367312/normal_603e3af69ee73.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/megulu/impossible_quiz_answers_question_56.pdf
    • https://s3.amazonaws.com/xulikamul/1689_london_baptist_confession_leather.pdf
    • https://9eb5ee95-128e-4115-bcd6-d8db8525ce49.filesusr.com/ugd/9904c2_9f16bd55095f49418bd538c492d23b3f.pdf?index=true
    • https://s3.amazonaws.com/xafaxotaful/cnbc_halftime_report_panelists.pdf
    • https://75cc4b12-69da-4024-8422-75f9303faa99.filesusr.com/ugd/d6c222_fe540f6a961d4de49f62a5d294badb59.pdf?index=true
    • https://s3.amazonaws.com/jezobasit/timex_heart_rate_monitor_watch_band_replacement.pdf
    • http://purevaxa.epizy.com/scratch_3._0_app.pdf
    • https://s3.amazonaws.com/jazofi/26041112125.pdf
    • http://zekuvug.rf.gd/bhavani_ashtakam_kannada.pdf
    • https://7c50ec62-1ece-451b-b03c-4788199016cf.filesusr.com/ugd/635f3c_07a91200ed70402584689b0addc096b6.pdf?index=true
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2cb.bin
c44c9ef692fcdbf366b05b9afb00d814636fde77a6f37f91ffbfb104344d260e
pdf-font-stream PDF embedded font (sfnt) at offset 0xF2CB 5076 bytes