Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2e7aa155293dcc8…

MALICIOUS

PDF

82.7 KB Created: 2020-12-31 03:48:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: e121fd2fba508734b9280a3423f50980 SHA-1: 9764a1ecf1a726502b815c0c09858bad5f02ae95 SHA-256: f2e7aa155293dcc8f93749096a9fe91b6f80df21d1883fd0637c0cbcba8a7560
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to redirector infrastructure and link farms, indicating a phishing or scam attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the presence of numerous external links and the PDF structure suggest an attempt to redirect users to malicious sites, likely for credential harvesting or malware distribution.

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
  • 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://ggtraff.ru/123?utm_term=sports+authority+coupon+printable In PDF document text
    • https://cdn.sqhk.co/bibilofefi/XfD5CHv/xolugalaletag.pdfIn PDF document text
    • https://jakuxilo.weebly.com/uploads/1/3/4/7/134711712/1901739.pdfIn PDF document text
    • https://zazukorowoko.weebly.com/uploads/1/3/4/4/134488568/4485078.pdfIn PDF document text
    • https://wumunelopilum.weebly.com/uploads/1/3/4/3/134395902/11a3b.pdfIn PDF document text
    • https://rujupiben.weebly.com/uploads/1/3/4/8/134852491/217439.pdfIn PDF document text
    • https://xumogimunosu.weebly.com/uploads/1/3/1/6/131607683/8320e8e68f2fd3c.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/gezetega/xuzabifavivopesajakafaki.pdfIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/99728460164.pdfIn PDF document text
    • https://s3.amazonaws.com/punurum/5444025410.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawe/android_tv_box_tx8_max.pdfIn PDF document text
    • https://s3.amazonaws.com/patotale/jack_lalanne_power_juicer_express_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/zubuwujoxom/tagofinipi.pdfIn PDF document text
    • https://s3.amazonaws.com/mesotodimus/dosobokejedib.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_off0001082e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1082E 5364 bytes
SHA-256: e16fea530dbf18cfdcb3cc97f420a284974ab63f4660750205bb581767f678eb
font_01_sfnt_off00011a66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A66 10444 bytes
SHA-256: b135dd4c604685cf4ab8380e79ff53aa64f654557181bec278b43584d2cdc0c3

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