Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0ea8f08cfecf565…

MALICIOUS

PDF

70.4 KB Created: 2021-03-07 17:37:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 02177a2fdd1c55ab571b950cf9209698 SHA-1: b9ff3942d20ea4e74f0df2e20b3d15219032c663 SHA-256: a0ea8f08cfecf565e7d478149a6d41845b33f49d725a05e9abd7df392d5be117
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The embedded URLs and the document's structure indicate an attempt to disguise malicious activity as legitimate search results or educational material.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • 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://jumiwimov.ru/wix?keyword=natural+selection+simulation+at+phet+answer+key PDF link annotation
    • https://vajipexinonadol.weebly.com/uploads/1/3/4/0/134096003/856476.pdfIn PDF document text
    • https://pewepexit.weebly.com/uploads/1/3/4/6/134659954/kelomig-dijunetogeku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502464/normal_602376beb872a.pdfIn PDF document text
    • http://reduslim-shop.site/zora_neale_hurston_their_eyes_were_watching_god2k9oa.pdfIn PDF document text
    • https://zevixaxilifudex.weebly.com/uploads/1/3/4/1/134131629/mirekakumavumivaru.pdfIn PDF document text
    • https://nevomunetis.weebly.com/uploads/1/3/0/7/130740414/51bed.pdfIn PDF document text
    • https://pawimugonuri.weebly.com/uploads/1/3/4/8/134882006/wotitub.pdfIn PDF document text
    • https://wimukevefom.weebly.com/uploads/1/3/0/7/130739067/4099321.pdfIn PDF document text
    • https://jexabuwojese.weebly.com/uploads/1/3/1/3/131384148/nodovinezure.pdfIn PDF document text
    • https://xekuruwagimutuz.weebly.com/uploads/1/3/2/6/132696141/bizixaled.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482002/normal_604132dac8ced.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413587/normal_602c453c0d93a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382948/normal_602ac1f9e7c21.pdfIn PDF document text
    • https://paleforekirito.weebly.com/uploads/1/3/4/5/134579508/rorivupegalel.pdfIn PDF document text
    • http://arthromedro.xyz/toyota_forklift_replacement_partsaxvx2.pdfIn PDF document text
    • https://pudonaneguk.weebly.com/uploads/1/3/4/7/134767047/kedakifiru.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f3dcd8e3-6656-4b47-a81e-a993d3c4f2a1.filesusr.com/ugd/aa9ef2_f0997adc142540ea865865b6ffd4158e.pdf?index=trueIn PDF document text
    • https://93dbb2ad-f1e8-4c6c-adfd-2ef134399473.filesusr.com/ugd/df4650_8ee0881bf81346038958ae8c0d652783.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/juduk/information_about_quaid_e_azam_university_islamabad.pdfIn PDF document text
    • https://s3.amazonaws.com/jevopemosod/dream_interpretation_dead_mother_angry.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6A2 5400 bytes
SHA-256: 15c96f74371ff5da61cadf5d0d4ca6ba0bda7f56d5b80296531b90dbc37bd06a
font_01_sfnt_off0000e8f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F0 10136 bytes
SHA-256: 7a083cff176ef266dbe2fe4fdb6d3c99187a9433728ddf3d3d68d60a295c09c6