Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba8d227a21a9eec0…

MALICIOUS

PDF

92.4 KB Created: 2021-04-30 18:33:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 201350180ac30f16959e6a3062d2edf9 SHA-1: e0f0ed2b3eb921aeab48c861871c8b234f5a7b39 SHA-256: ba8d227a21a9eec04e29eade6b536aab6d2e36c2e16f2fd40d190f8371a09121
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or phishing campaign. The document body, though heavily obfuscated, appears to be related to movie titles, likely a lure to disguise the malicious intent of directing users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/strik?utm_term=the+sword+of+summer+movie PDF link annotation
    • http://idealica-uficialeitalia.website/smashing_rush_mod_apk_1._6._8c5x2v.pdfIn PDF document text
    • https://pidowiwosuzaji.weebly.com/uploads/1/3/0/9/130969191/valewuzofudabobonaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386593/normal_6009b85bde626.pdfIn PDF document text
    • https://xelixexojiga.weebly.com/uploads/1/3/4/1/134108676/d877d9.pdfIn PDF document text
    • https://rejejowurodesom.weebly.com/uploads/1/3/1/3/131398559/4510802.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449627/normal_604f91b14f840.pdfIn PDF document text
    • http://adyga.site/revewid8hqcv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481285/normal_6041f978c0001.pdfIn PDF document text
    • http://instapriz.online/62185548452mqqje.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383798/normal_603b0c5783bd6.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
    • https://dc6b22d1-fd3c-476a-b8f1-b0505981f591.filesusr.com/ugd/ab5adf_f6e1d8b1516849efbfbc3849c6015adc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vudivuzakal/list_of_command_prompt_commands_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/wukevirenesu/sap_basis_tutorial_for_beginners.pdfIn PDF document text
    • https://s3.amazonaws.com/metakibeme/19950964345.pdfIn PDF document text
    • https://f9c380c0-3c9a-404e-8c76-a924832b335c.filesusr.com/ugd/9c8fb9_799679ead65b445eb560745b35fe1260.pdf?index=trueIn PDF document text
    • https://dc383e6d-b7a3-4e67-a88a-227fa542b6c3.filesusr.com/ugd/72b0e7_12547eef0a2348eb9a4b1904b9f07e24.pdf?index=trueIn PDF document text
    • https://992bddda-184d-467f-a815-0165b41a2208.filesusr.com/ugd/69695d_82e0fc851ce242cfb1059cc1f56d567f.pdf?index=trueIn PDF document text
    • https://df1d5e35-4e67-4e57-ba41-6141a32c4ecb.filesusr.com/ugd/c54278_cf27c29707c54fcd88c951e6baa115ad.pdf?index=trueIn PDF document text
    • https://b0cee159-9ce3-47d2-9452-de9e383f1b6b.filesusr.com/ugd/fac5c7_977f591fe9b24dfe9a79e226990f5cfa.pdf?index=trueIn PDF document text
    • https://ecab545c-19d2-4654-b6ac-fb8b9749f5ba.filesusr.com/ugd/e5412a_e8685fa4e61e49f6a976d66951583dd8.pdf?index=trueIn PDF document text
    • https://4eb3a9b5-ca6a-4b2a-896e-878abc754f3b.filesusr.com/ugd/f1ab86_a3490fd30a9249a89bdd05402b9c6ba5.pdf?index=trueIn 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_off00011e63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E63 4700 bytes
SHA-256: 306e10e9c8ca20b5121569b848f4ba3dba590941216c2f911cf3f1ccf7cedce3
font_01_sfnt_off00012e6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E6B 11168 bytes
SHA-256: 8a7747bb0397d2bbcf191632d0f0fbc151ad2dce43b35c7b0dea9b81c46d3cd8
font_02_sfnt_off00015461.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15461 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176