Malicious PDF — malware analysis report

Static analysis result for SHA-256 056a25b8a0ec5115…

MALICIOUS

PDF

71.8 KB Created: 2021-01-09 11:03:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 47503f3f913c43c8d6d85b497701b289 SHA-1: 541745cffed132ea51bde8dc83cafffa5e2d7dd6 SHA-256: 056a25b8a0ec5115617c5180bec8ee6a69d6515736afe3f562ef5cc487605e2d
222 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains multiple heuristics indicating malicious intent, including links to known malicious redirectors and a link farm. The ML classifier strongly flagged this PDF, and ClamAV detected it as a phishing trojan. The embedded URLs suggest an attempt to redirect users to malicious sites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://traffmen.ru/123?utm_term=golden+rule+botanicals+reviews In PDF document text
    • https://cdn-cms.f-static.net/uploads/4451348/normal_5fdbae8666b24.pdfIn PDF document text
    • https://pefikasulanak.weebly.com/uploads/1/3/4/3/134350375/dedifezebiza_luvasumonaf_judabu_jobuwamubavofo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412757/normal_5fe83f5789e08.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368248/normal_5fd958511f383.pdfIn PDF document text
    • https://furureseseruwa.weebly.com/uploads/1/3/4/4/134481841/bagagutadepekiti.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464527/normal_5fb3f0c4d36f3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458614/normal_5fee803c6eb3e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a37e34c-2e51-44b1-a496-5ffbba1eb739/72902273078.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb19700f-51a5-4124-8de0-410d8eaa1dec/wopirixepajukusofopurepe.pdfIn PDF document text
    • https://s3.amazonaws.com/povodijirig/tolanimowawexukamideg.pdfIn PDF document text
    • https://s3.amazonaws.com/nefunupu/faxagirofa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48630bb3-c3e0-4703-bd77-ecec0256a246/beloxu.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_off0000daf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAF3 5256 bytes
SHA-256: 6a94011fce8012dc1a908784cdf7adeb533dcca512b25b83e57589943f414a4c
font_01_sfnt_off0000ecf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECF3 11052 bytes
SHA-256: e415fff2c1f62c66ea91d2ec478cd82df90a963e622ad10fe62d9274b3cc1dee

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