Malicious PDF — malware analysis report

Static analysis result for SHA-256 0759c62eb3443b7b…

MALICIOUS

PDF

64.8 KB Created: 2020-12-01 08:40:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 39c04d899a0f8bebca3bc8ae6badb590 SHA-1: e0567cf99572d0b3f64ad93b843ac26cb93a8db0 SHA-256: 0759c62eb3443b7becd5249ce7edf6b1bb5dcde8c9fc635418c1ed05aea6aa16
154 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a phishing or trojan payload. It contains a critical heuristic firing for a PDF redirector link pointing to 'https://ggtraff.ru/aws?utm_term=android+handheld+barcode+scanner+bluetooth', suggesting an attempt to lead the user to a malicious site. The document body, though heavily obfuscated, contains metadata related to wkhtmltopdf and a date, but no clear instructions or lures are discernible from the readable text. The primary attack vector appears to be the embedded malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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.
  • 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/aws?utm_term=android+handheld+barcode+scanner+bluetooth In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365553/normal_5f8d5f2ced104.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366036/normal_5fa72a523054e.pdfIn PDF document text
    • https://zujomesesewega.weebly.com/uploads/1/3/4/9/134902804/4375821.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450354/normal_5f9f249aa7f02.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd0f4968bfc518616a6fcb/1606225738257/google_sites_permissions_not_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53af94df-92b1-4906-b6e9-87df86d5f4b0/xuvivuduzexivodove.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5145da3bf4b14abc40464/t/5fc57904f3de5e49b51f4ba5/1606777093596/14165941102.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/40411792805.pdfIn PDF document text
    • https://s3.amazonaws.com/nefomojuwet/skeleton_creek.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbfd008c14dfd36feeb1b6e/t/5fc1c4fb3c02f22b9d4ef4c8/1606534396742/26772452779.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_off0000c296.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC296 5156 bytes
SHA-256: 250cf79d6968d8c2f5a5e448ec4e40b50efb2cae2d88986a0c7eeb5deca04e5c
font_01_sfnt_off0000d412.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD412 10264 bytes
SHA-256: 5260cfaf251f0a1ec370af35d1653c1b298158c8fb07e06cf392738d9d92bb83

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