Malicious PDF — malware analysis report

Static analysis result for SHA-256 dba854badb16788c…

MALICIOUS

PDF

77.2 KB Created: 2021-03-15 20:32:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: ba96a77c4da5aec065760934bb3f3ee1 SHA-1: 7ba67f53cb3dde133186d58ddc09d52fc537f2d2 SHA-256: dba854badb16788c987cb34ec0bd6fb4668cc66760f85bbdf7b4824f2fb2e63e
244 Risk Score

Malware Insights

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

This PDF file contains a significant number of embedded links, many pointing to disposable hosting services, indicating a link farm designed to manipulate search engine results or direct users to malicious content. The presence of a known malicious redirector URL further supports this. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of phishing or SEO manipulation tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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.
  • 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://yafferge.ru/wix?keyword=trailer+guide+post+covers In PDF document text
    • https://fopunideneluw.weebly.com/uploads/1/3/5/9/135965314/gejadineneliluwilej.pdfIn PDF document text
    • http://bawazofo.getenjoyment.net/tokyo_ghoul_re_manga_anime_differences.pdfIn PDF document text
    • https://wabelorija.weebly.com/uploads/1/3/4/6/134685543/vazofidim-momujabidatiko-pawipakanidoluv.pdfIn PDF document text
    • https://vidijizuv.weebly.com/uploads/1/3/0/7/130776341/bajixudozivib.pdfIn PDF document text
    • https://sileperu.weebly.com/uploads/1/3/1/4/131406390/7747808.pdfIn PDF document text
    • http://fewaxizix.iblogger.org/jvc_kw-r910bt_pairing_full.pdfIn PDF document text
    • http://lezigovedavide.getenjoyment.net/zifivaposo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vaxeridijif.epizy.com/astronomy_today_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/880b5477-e30f-4d29-9175-e582a842fbec/how_to_use_excel_for_beginners.pdfIn PDF document text
    • https://s3.amazonaws.com/zexozavo/84027189112.pdfIn PDF document text
    • https://s3.amazonaws.com/zurovajij/96848818760.pdfIn PDF document text
    • http://gopinos.epizy.com/english_grammar_for_dummies_3rd_edition.pdfIn PDF document text
    • https://a7ed8af5-5e4a-4eaf-98d7-51655494ca15.filesusr.com/ugd/b5c45a_69ad3831eaa94bffbabed4af0c318847.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7757cdc-b261-49ee-ab21-f3fc7a663351/15906021019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e7106e7-3c21-49ec-b9cf-619cdbf9b01b/6749593838.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83ab46ab-0df3-4e36-93a0-26ff22c254f7/adobe_illustrator_classroom_in_a_book_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/laginekux/zefogasut.pdfIn PDF document text
    • https://f07eb630-23ff-4298-a1df-d7940f1ba2dc.filesusr.com/ugd/097a5b_3ee5cb8159d64e2897971ca913428326.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7766339d-9d45-47e2-b797-7c334afed8ef/76599752175.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_off0000f1d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D1 5248 bytes
SHA-256: cf8c539d39ddb0bda1fd8c37ad593c712097ffcf07151178e2f3cf5a3119fae6
font_01_sfnt_off000103bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103BF 10648 bytes
SHA-256: 809c12ec52afe06dd9aaaa5198de740f871a305e586962860962b28e1f1628ea