Malicious PDF — malware analysis report

Static analysis result for SHA-256 e68b42250417386f…

MALICIOUS

PDF

73.3 KB Created: 2021-06-13 03:52:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: b99539a402a05b6cf882807daf50e1dc SHA-1: e986c828fc532e361959fa0851c679530572d714 SHA-256: e68b42250417386ff74d8fc76527e3d362766edfbb34ccfebe87c82787ced445
244 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which are designed to lead users to potentially malicious websites, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body appears to be obfuscated or corrupted, preventing a clear understanding of its specific lure, but the presence of numerous external links points to a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://dafemum.ru/123?utm_term=grade+1+patterning+worksheets+free In PDF document text
    • https://nimivisedasefu.weebly.com/uploads/1/3/1/0/131070972/9520676.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408004/normal_5fe2aec993c61.pdfIn PDF document text
    • https://somejokal.weebly.com/uploads/1/3/4/4/134494219/wakufovopetefalup.pdfIn PDF document text
    • https://ralaxegivasud.weebly.com/uploads/1/3/0/8/130813417/tilaxibubebo.pdfIn PDF document text
    • https://semoligi.weebly.com/uploads/1/3/0/9/130969118/sezimejojep_kofoteka.pdfIn PDF document text
    • https://jugunita.weebly.com/uploads/1/3/4/4/134440710/7694877.pdfIn PDF document text
    • https://genolawibiwiz.weebly.com/uploads/1/3/4/3/134316454/kagamudalapilulidi.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4492573/normal_60b53f9e564b0.pdfIn PDF document text
    • https://pitalozel.weebly.com/uploads/1/3/1/3/131384414/gapugenojaduk.pdfIn PDF document text
    • https://rigokapine.weebly.com/uploads/1/3/4/5/134593974/lurikafopare.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380531/normal_600be3ef38572.pdfIn PDF document text
    • https://gegefajowib.weebly.com/uploads/1/3/1/3/131380265/gitujerolisebevi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zuvevetub.pbworks.com/f/what_organisms_use_cellular_respiration.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e22cef63-398c-4665-b53a-21d0a5d15151/best_news_app_for_android_tv_in_india.pdfIn PDF document text
    • http://tisowowuduwe.pbworks.com/w/file/fetch/144418989/easy_worship_guitar_chords_and_lyrics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27c71147-a512-471a-8cf6-e1e3fd45fe8e/dyson_dc44_battery_type_a_or_b.pdfIn PDF document text
    • http://najapenoz.pbworks.com/f/salaire_prof_de_franais_collge_priv.pdfIn PDF document text
    • http://fezosubi.pbworks.com/w/file/fetch/145050417/cod_mobile_android_controller_support.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb4e16fa-ac58-4879-848f-bd13ab10c8b5/sogumusol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a93cdaf3-13ee-4671-919a-ecd074911ae4/how_much_do_massage_therapists_make_in_australia.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_off0000e113.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE113 5508 bytes
SHA-256: 47a96487c1145c733a4907efcefd91125ef308ab9d61dd3d8b4a0d765bdbaaba
font_01_sfnt_off0000f3ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3ED 10032 bytes
SHA-256: 230d3ab64df98fecff82a3df1bc462d3a98e8522fc5944335271f0eb458d0b92