Malicious PDF — malware analysis report

Static analysis result for SHA-256 808921d5c16e695a…

MALICIOUS

PDF

78.4 KB Created: 2021-02-12 19:14:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 01328656fce1b4616fce6f19f9300f02 SHA-1: 597fc5c2723f9d4ffd14c280ae884d88ee899ea5 SHA-256: 808921d5c16e695a73b8d74cbcd50307b49d06094494188707d7c4bdd7303076
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a technique often used for SEO poisoning or phishing. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of links, suggesting an attempt to drive traffic to malicious or deceptive websites. The ClamAV detection and ML classifier further support its malicious nature, likely as a phishing or spam distribution tool.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://baarspo.ru/wix?keyword=war+storm+pdf+online PDF link annotation
    • https://wapapoda.weebly.com/uploads/1/3/4/5/134581042/buzagunuwogakozejak.pdfIn PDF document text
    • https://sazadasixitabe.weebly.com/uploads/1/3/4/4/134404720/tuxemifisimetisif.pdfIn PDF document text
    • http://tedewirivotu.iblogger.org/birmingham_city_fc_fixtures.pdfIn PDF document text
    • https://gufekesunix.weebly.com/uploads/1/3/4/8/134888283/7372619.pdfIn PDF document text
    • https://reponobokuwe.weebly.com/uploads/1/3/5/4/135401207/ed2ae59b3caad8.pdfIn PDF document text
    • https://wibakaxidame.weebly.com/uploads/1/3/2/7/132741334/jonofofer_jirono.pdfIn PDF document text
    • https://vobajorod.weebly.com/uploads/1/3/1/4/131438629/futabo_latunejozewes_jitazobotafibu_rejudojugad.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zotuxegusam.epizy.com/prime_factorization_christmas_tree_worksheet.pdfIn PDF document text
    • http://sazosubegus.epizy.com/60296229469.pdfIn PDF document text
    • http://labomodofu.epizy.com/kapegir.pdfIn PDF document text
    • https://s3.amazonaws.com/netinuwa/abc_radio_app_android.pdfIn PDF document text
    • https://s3.amazonaws.com/naxozelozude/ucas_2019_adviser_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/bededuxotulapil/childish_gambino_free_video.pdfIn PDF document text
    • http://jiwepatifon.rf.gd/aocs_cc_13e-_92.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxutedi/fagamilirexubaririjixug.pdfIn PDF document text
    • https://s3.amazonaws.com/nazekisigiduz/enable_developer_options_android_10.pdfIn PDF document text
    • https://s3.amazonaws.com/mokuwanibof/broken_angel_mobile_ringtone_free.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_off0000f5f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F7 5200 bytes
SHA-256: 8230826d0ca092bc7eb1119456aa3f0fe604859bed648d6feefd436b506ec20f
font_01_sfnt_off0001079f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1079F 10948 bytes
SHA-256: 37f0940015349255c4ae3962126898d91bead51e0c2532e1022a385b267dd574

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