Malicious PDF — malware analysis report

Static analysis result for SHA-256 badcd5bd30e9b2d7…

MALICIOUS

PDF

68.8 KB Created: 2020-12-16 07:19:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 6b37985dbb2b0fffd5a739ee9ab4d555 SHA-1: 1debd813166a1b07f2f265ea79c0f8b86b7fa539 SHA-256: badcd5bd30e9b2d7ae19d97eec2365242b91f3d302ae6dc8d9e418e127af0502
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 suspicious domains and are indicative of a link farm designed to redirect users to malicious content. The heuristic PDF_SEO_LINK_FARM and PDF_MALICIOUS_REDIRECTOR_LINK firings strongly suggest this malicious intent. The ClamAV detection and ML classifier further support the malicious nature of the file, classifying it as a phishing trojan.

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://ggtraff.ru/123?utm_term=pect+special+education+study+guide In PDF document text
    • https://diriremipujuna.weebly.com/uploads/1/3/4/2/134265666/xaninubufirogovo.pdfIn PDF document text
    • https://pasazobunev.weebly.com/uploads/1/3/4/6/134670772/8969449.pdfIn PDF document text
    • https://bilafewutugu.weebly.com/uploads/1/3/4/6/134619215/318d5efc0.pdfIn PDF document text
    • https://movireralu.weebly.com/uploads/1/3/4/8/134879142/97d7cd18.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/5fc5cf0117e72026400bb701/t/5fceaeaa99b6a7582b4c3635/1607380651175/51627264233.pdfIn PDF document text
    • https://s3.amazonaws.com/nepawigexa/schumacher_battery_charger_se_5212a_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/978ec75e-993e-435e-94c6-2e507ca985f8/intercultural_communication_globalization_and_social_justice.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2e5d45e-dbb2-4e70-89c8-231aecbfabaa/46654838004.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7f7292a-64a1-445c-8cfa-7b443e9a503a/77132875899.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc28400a5bc066edfafdea4/t/5fcb96b6b495bd20282408f2/1607177911196/drawing_board_inc._montpelier_vt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59833cb1-2990-4d9a-85d4-f1d458a12bb8/owners_manual_2011_ford_e450.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6a35cb1-a397-44e4-867e-9c2ea445ff51/baruch_college_academic_calendar_2021.pdfIn PDF document text
    • https://s3.amazonaws.com/legapatatezisa/5732777735.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2f978f9866f3fd2e1c9ef/t/5fc4b72e7acac6192a55f52b/1606727471189/peavey_jf-1_review.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5a0199698b02c7f40d820/t/5fc7f642926543238a6146a9/1606940227215/xazisebavilapowumabidiki.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_off0000cf3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF3B 5248 bytes
SHA-256: 7001fc39deb6891bb79a044fd075e3c61f2202b5f93424ab40aee1870cd80759
font_01_sfnt_off0000e134.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE134 10912 bytes
SHA-256: 4ccf860de57aa09f350a1bf2aefeef1b98fd2831d1eccbdd6c2259454f73f2b7

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