Malicious PDF — malware analysis report

Static analysis result for SHA-256 0abc83e789ecf199…

MALICIOUS

PDF

83.2 KB Created: 2021-04-15 07:53:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 05f5cab1a6d872ef1e2dc0fca005b2af SHA-1: 8adb653c36b8ca6b65b08df135bd511381878787 SHA-256: 0abc83e789ecf199e1f7bfd4884d2ddd68f010d9a842020fefd44e89de7c5ad5
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://fokemale.ru/strik?utm_term=the+brief+wondrous+life+of+oscar+wao+plot+summary PDF link annotation
    • https://gefetejumifigo.weebly.com/uploads/1/3/4/6/134688955/4379869.pdfIn PDF document text
    • https://lulofaki.weebly.com/uploads/1/3/1/4/131453598/7046260.pdfIn PDF document text
    • https://vebavorosufate.weebly.com/uploads/1/3/4/7/134742301/831629.pdfIn PDF document text
    • http://gisoboxizaza.mygamesonline.org/numetowipazofavadejemegax.pdfIn PDF document text
    • http://sixawuragime.iblogger.org/chirp_baofeng_radio_did_not_respond_mac.pdfIn PDF document text
    • https://xasirazabad.weebly.com/uploads/1/3/4/6/134699738/1140284.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494889/normal_6026681a4ab23.pdfIn PDF document text
    • https://xesuxikoju.weebly.com/uploads/1/3/4/0/134095833/bb4809.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457849/normal_603ee57b72686.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367617/normal_5fcbcd1599893.pdfIn PDF document text
    • http://zopaxonurur.iblogger.org/carcinoma_prostatico.pdfIn PDF document text
    • https://tazuwadafif.weebly.com/uploads/1/3/4/8/134857375/5995767.pdfIn PDF document text
    • http://xagabovano.22web.org/centre_of_mass_of_hollow_cone.pdfIn PDF document text
    • https://xuvowesajitox.weebly.com/uploads/1/3/4/6/134603534/555c51a94191c0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://fuwutowamig.myartsonline.com/antagonistas_colinergicos.pdfIn PDF document text
    • https://s3.amazonaws.com/jazamerijekufol/compare_2_excel_spreadsheets.pdfIn PDF document text
    • http://wapizivajuzufox.rf.gd/rerirerokabuwotodomigi.pdfIn PDF document text
    • https://s3.amazonaws.com/limewub/first_birthday_invitation_templates_for_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/swarm_intelligence_principles_advances_and_applications.pdfIn PDF document text
    • http://mokowiwar.rf.gd/aeroduct_flexible_duct_connector.pdfIn PDF document text
    • https://s3.amazonaws.com/gitipelut/phonetic_alphabet_tables.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f696.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF696 5560 bytes
SHA-256: 338278fad622e880a6c034603b2f474c1184c3412e0ea9b2889164b8a0c3bb6c
font_01_sfnt_off00010961.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10961 11112 bytes
SHA-256: c966da69f4da2ba8c0d7333d2f09fa57aebcdc5c890769e7c587c52ca6ac7776
font_02_sfnt_off00012f14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F14 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2