Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7f25d07ceaed40c…

MALICIOUS

PDF

73.2 KB Created: 2020-12-17 07:28:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 5f869782bcd2ba333bfbf823c0dc3830 SHA-1: 9b5dff33fcbe411664b1761dc17f60fc64847139 SHA-256: a7f25d07ceaed40c1f6fa6b57e4079334f4b0316bc1690653533acf3e515c42d
214 Risk Score

Malware Insights

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

The PDF file contains embedded links that redirect to malicious infrastructure, specifically identified as a redirector and a link farm. The document body, though heavily obfuscated, appears to be a lure related to 'social security office omaha ne locations', suggesting a phishing or scam attempt. The presence of multiple PDF links and a critical redirector link firing strongly indicates an attempt to lead the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://cctraff.ru/123?utm_term=social+security+office+omaha+ne+locations In PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/3079835.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426262/normal_5fc2ee0a31d1b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406497/normal_5f9fc2b63867e.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/5fc597a0f9866f3fd2f3d113/t/5fd62caa491a58544a0a0792/1607871662121/allez_allez_allez_song_liverpool.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c1577b6-a1c6-498f-831b-f787cf7b9ecb/airsoft_tanker_stock.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e627116eb00e3c4beed8/t/5fc155f25147b14804653c7f/1606505971059/53526582035.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd19df9eac5d50e5691dec/1606228449851/7349393409.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc54b0340f1034a5cc5e190/t/5fcc9b97d235d37878c0d560/1607244697008/women_s_college_basketball_coaching_jobs_openings.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2ae5e1c8c7413143d62f6/t/5fc577313f75b166438d8d78/1606776631750/martinsville_in_weather.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc794ae03f04e270fe55a11/t/5fd68305267c8d0ace4c415c/1607893771736/27493029427.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0028ac14dfd36feec75cc/t/5fc0eb5c9b1ed03538fced47/1606478684791/blue_merle_puppies_near_me.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd0991edabee7b4408eaf0/1606224274026/48636149302.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_off0000dff3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFF3 5324 bytes
SHA-256: de2597e3587265fe45952b690de580c2f87644f30c1293d7ca52ede6d92e6b91
font_01_sfnt_off0000f1ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1ED 11340 bytes
SHA-256: b968f2d8fcd867db7e87b68174918b65ebd1dd0c05217746f6b56fa12e54e902

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