Malicious PDF — malware analysis report

Static analysis result for SHA-256 802bcf140186cd4f…

MALICIOUS

PDF

79.3 KB Created: 2020-11-22 00:12:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 235c483dbe2caa637f6a2caad769ca99 SHA-1: c82279d3eb238c8dadde508521dcda0084bc4258 SHA-256: 802bcf140186cd4fc3f17f05431081ed033316ac2c4374671621ff7856a58e61
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources, indicating a link farm or redirection strategy. One critical heuristic identified a link to known malicious redirector infrastructure. The ClamAV detection and ML classifier further support its malicious nature, classifying it as a phishing trojan. No scripts were extracted, but the presence of numerous URLs suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/123?utm_term=serpentine+belt+tool+advance+auto In PDF document text
    • https://rulozakowix.weebly.com/uploads/1/3/4/7/134730123/vonepesusavovu.pdfIn PDF document text
    • https://korodaziso.weebly.com/uploads/1/3/0/7/130740443/c580dc.pdfIn PDF document text
    • https://walasopi.weebly.com/uploads/1/3/4/5/134588780/b4b00a.pdfIn PDF document text
    • https://boseveju.weebly.com/uploads/1/3/4/5/134595203/zagaposa_tagoxunivifurot_lewuzufufi.pdfIn PDF document text
    • https://joleziravakejar.weebly.com/uploads/1/3/4/4/134460301/3598183.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420903/normal_5f9ddaee2fd99.pdfIn PDF document text
    • https://jivarogogujuno.weebly.com/uploads/1/3/4/5/134513891/37da69e.pdfIn PDF document text
    • https://firerokuk.weebly.com/uploads/1/3/1/1/131164187/wirozodagotovutib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375199/normal_5f8ddffb66452.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/sevorelolagugekoxizi.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/rrb_alp_answer_key_download_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09dd72ab-59e9-43de-b5cd-6d3e8f58bb18/85322578129.pdfIn PDF document text
    • https://s3.amazonaws.com/norozovijalu/espiar_whatsapp_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/wofaxil/td_bank_ppp_application_online.pdfIn PDF document text
    • https://s3.amazonaws.com/jaxesabi/rulubafijiju.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_off0000fac4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC4 5192 bytes
SHA-256: 6bafd7a74c5837f19b98f95aef66b0fd84245f46e44665d647fc51f32a68da00
font_01_sfnt_off00010c7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C7D 10408 bytes
SHA-256: ad9796182343cde6dd4ca21985ac77b4e64151907eebc8e18ed16c179811cf99

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