Malicious PDF — malware analysis report

Static analysis result for SHA-256 e14c414459263935…

MALICIOUS

PDF

172.6 KB Created: 2021-01-04 21:05:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 5a7c0826598895dbc00471c20059e1c9 SHA-1: 6d879d78787e6f7c0f4f20d102f311a4018ec400 SHA-256: e14c4144592639350ae1c1bc280f2ae84902e35baf7b8b3152c989761f3dc26f
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://gettraff.ru/123?utm_term=round+hill+elementary+school+rating'. The ML classifier also flagged this PDF with a high probability of being malicious. While no scripts were extracted, the presence of a malicious URL strongly suggests a phishing or malware delivery attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://gettraff.ru/123?utm_term=round+hill+elementary+school+rating In PDF document text
    • https://cdn.sqhk.co/xeliwiwogivo/hlicgih/strawberry_shortcake_card_maker_dress_up.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472479/normal_5ff15905abc69.pdfIn PDF document text
    • https://baforaze.weebly.com/uploads/1/3/4/7/134756429/54fc6.pdfIn PDF document text
    • https://cdn.sqhk.co/kojanakif/ggcXpjg/samurai_wallpaper_iphone_xr.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428069/normal_5fc1e27d1bde2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410695/normal_5f9e636d7e1e4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469641/normal_5fe26e73bdfd9.pdfIn PDF document text
    • https://vomogavuxif.weebly.com/uploads/1/3/4/7/134762738/kidekefugetukak.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/a2e9afa0-948f-4191-ac37-e7f8cf057d41/77176003884.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f75c6144-7e68-44f4-bd5c-47665e9685fe/vudutejexadi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b58a86f2-f868-45e5-bcfc-b388be3310ca/cachimbas_giratorias_sevilla.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7683c01-e067-4b2e-b4cc-012fc673135a/96001086157.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb52af40-fc8d-4a01-ac49-9e3567e76e66/b_horizon_soil_description.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_off00025e81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25E81 5344 bytes
SHA-256: c236a950b4c3d05f8ff6f81c7934caa64dd511874de37e055458e982ad5d48a9
font_01_sfnt_off0002707d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2707D 11252 bytes
SHA-256: a4fe7cfb8fa3e0f0ac57bae814c1c34dcd2f1b3b446d49c52caf40eeb7309f59
font_02_sfnt_off0002966c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2966C 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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