Malicious PDF — malware analysis report

Static analysis result for SHA-256 1068722ae2e0d48f…

MALICIOUS

PDF

84.9 KB Created: 2021-02-06 21:47:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: f81bf7fa1573b7dfca1ca5b047beab02 SHA-1: 7cdbceb61f639d83c1cce732fa5a49849a31c141 SHA-256: 1068722ae2e0d48f0c623ba844ec17a48315b39de4f21662f8ce79a096ca7687
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to known malicious redirectors or are part of a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the PDF structure itself is weaponized to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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/aws?utm_term=wow+professions+blacksmithing+leveling+guide In PDF document text
    • https://cdn.sqhk.co/zunezafi/RIieria/my_little_baby_sick_song_lyrics.pdfIn PDF document text
    • https://cdn.sqhk.co/povewepalu/ophejei/dune_bashing_club_in_dubai.pdfIn PDF document text
    • http://reactivaperu-viabcpi.com/fabrication_dun_extracteur_de_miel1k6o7.pdfIn PDF document text
    • http://tiktoktop.design/12718411718nwyup.pdfIn PDF document text
    • https://cdn.sqhk.co/nebafori/id03hju/best_frosting_recipes_ever.pdfIn PDF document text
    • http://taygerr.com/273400608976oo38.pdfIn PDF document text
    • http://reduslimitalia-official.website/panda_docs_workflow3xucm.pdfIn PDF document text
    • http://yandex-delivery.cc/andres_segovia_asturiaspeecg.pdfIn PDF document text
    • https://xixebume.weebly.com/uploads/1/3/0/9/130969831/vogamizigeg-semuporavuwoteg-merozadikugefo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xukirizugukugi/letagewapilojoresonakob.pdfIn PDF document text
    • https://s3.amazonaws.com/widiku/posazuged.pdfIn PDF document text
    • https://s3.amazonaws.com/bisiku/convert_kindle_to_on_ipad.pdfIn PDF document text
    • https://s3.amazonaws.com/pizexopenaxu/kexaf.pdfIn PDF document text
    • https://s3.amazonaws.com/potamotaz/angles_in_polygons_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/rabewiruzitewa/15713960698.pdfIn PDF document text
    • https://s3.amazonaws.com/laradusa/duxexavapuvidenegisowig.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/unity_animator_vs_animation_performance.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_off000105d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105D2 5936 bytes
SHA-256: a6dc8bcbd58618086cc85286992ba35f382165fea491a4b6b9f3dbc4a88c6cf5
font_01_sfnt_off000119fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119FD 14052 bytes
SHA-256: 889d86a1d0817379a703eb13a7505c0f9dde9394100fea7647ec7f7ea1785bd4

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