Malicious PDF — malware analysis report

Static analysis result for SHA-256 699e5e2f1f149e5c…

MALICIOUS

PDF

78.5 KB Created: 2021-03-24 19:30:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 6455ecc370528b6d3861311d1674ddf5 SHA-1: cbc0883c59c17785dc2844bc13b2b8953cac0224 SHA-256: 699e5e2f1f149e5ca822633b77564dd87554a6d4458cf4749189f12b1ca2a75d
244 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical finding for linking to known malicious redirector infrastructure. The document contains a large number of embedded URLs, many hosted on disposable domains, suggesting a link farm or phishing campaign. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of an attempt to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://crophysi.ru/wix?keyword=robert%2527s+body+shop+greenwood+south+carolina In PDF document text
    • https://ludodufapagita.weebly.com/uploads/1/3/4/6/134616483/9752404.pdfIn PDF document text
    • http://vexasefagi.scienceontheweb.net/latex_beamer_insert.pdfIn PDF document text
    • https://sepuvomaxobaba.weebly.com/uploads/1/3/5/3/135311468/xuredupipikubadaluw.pdfIn PDF document text
    • http://poruzotosiku.getenjoyment.net/katalog_mccb_schneider.pdfIn PDF document text
    • https://zilasemewoxuj.weebly.com/uploads/1/3/4/3/134318224/megumirujosik.pdfIn PDF document text
    • http://muwiduvepobuz.mygamesonline.org/allahabad_high_court_aro_2020_question_paper.pdfIn PDF document text
    • http://zuzavepojul.mygamesonline.org/45754714876.pdfIn PDF document text
    • https://tilapenudulaw.weebly.com/uploads/1/3/1/6/131607943/2c3899cb7c9512.pdfIn PDF document text
    • http://nezowigivomi.scienceontheweb.net/sojivowud.pdfIn PDF document text
    • http://zugapuvu.mywebcommunity.org/ap_lang_essay_grading_scale.pdfIn PDF document text
    • https://jetabasujupeg.weebly.com/uploads/1/3/4/7/134703241/fitutupamesajap.pdfIn PDF document text
    • https://bizavurodetilu.weebly.com/uploads/1/3/4/3/134391156/zarafuzeje.pdfIn PDF document text
    • https://pufoputinagof.weebly.com/uploads/1/3/4/2/134234879/dasuvikojoravafapite.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kulebosux.myartsonline.com/how_to_read_weather_icons.pdfIn PDF document text
    • https://12dd324c-696b-4d67-8c19-991f3eacec2c.filesusr.com/ugd/eeb7bd_aaf788d170e548db927044d0fbe7e4e6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fd97059-4b09-4291-af0a-7603a91f41c1/29768314131.pdfIn PDF document text
    • http://xiwozoget.atwebpages.com/89810244558.pdfIn PDF document text
    • https://8650d040-a33d-467d-a608-6706f181f11b.filesusr.com/ugd/61b8bf_94ebff01a97340a682443d0ee7ecac74.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/84f65665-19a7-4d3e-a470-1ec0407749c3/naripemagutubizevu.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_off0000f489.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF489 5708 bytes
SHA-256: 1aabffbc019cc3dc3d7c8db0eaf1e2e5dae6acb6a3a1f15071a84e2b2110d93e
font_01_sfnt_off00010811.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10811 10632 bytes
SHA-256: abf411afde4481a0aaf150e7d856ea4a4f4c24b962f1cc61891e6b27f64d615f

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