Malicious PDF — malware analysis report

Static analysis result for SHA-256 80e56aade19405d6…

MALICIOUS

PDF

76.9 KB Created: 2020-12-25 01:23:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 754e864cc22d32e115fa84b7c6bf2caf SHA-1: 7bccafb533d71e09725a13da7c956745179b081d SHA-256: 80e56aade19405d6ea94571f2f224414d23de87ce929da0f9f4213cff676eda9
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with at least one pointing to a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing further malware. The document body is heavily obfuscated and unreadable, but the presence of numerous external links suggests a link farm or redirection scheme.

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://traffking.ru/aws?utm_term=jinja+template+render+example In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369802/normal_5fc1e6cdd70a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468268/normal_5fa7fd581d320.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426066/normal_5f9848fbd9709.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378386/normal_5fd9a25d790ec.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413122/normal_5fe2b8dc81b69.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377371/normal_5f8a78992ba46.pdfIn PDF document text
    • https://sanositew.weebly.com/uploads/1/3/1/8/131872303/vexovu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/70aab3b2-a041-4559-8888-264f0fa80dc9/5343024141.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fce01a32-8c00-4820-947a-9a327f7d0fbf/washington_county_md_school_district_jobs.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/95945171162.pdfIn PDF document text
    • https://s3.amazonaws.com/mubefula/gear_guide_for_shai_bdo.pdfIn PDF document text
    • https://s3.amazonaws.com/kabisebax/bengali_web_series_jalshamoviezhd._com.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecb52c26-5f5d-48fe-84c6-fa36e4289ab2/81989690107.pdfIn PDF document text
    • https://s3.amazonaws.com/nitizobuv/file_unzipper_for_android.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e072.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE072 4736 bytes
SHA-256: b336323bade46488f2a083fc5478243288a12f4c964925437dc21b296e02b8b0
font_01_sfnt_off0000f064.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF064 11776 bytes
SHA-256: de6bf204ffb4add12a8d3a364933bc7e9829e7cd2bf6b2305bc4484e97330370
font_02_sfnt_off000118c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118C4 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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