Malicious PDF — malware analysis report

Static analysis result for SHA-256 30552929f7b5494c…

MALICIOUS

PDF

94.2 KB Created: 2021-02-13 10:31:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 64f0d09ef2abaec092056e1f6c465d3b SHA-1: 2e5bac11eea56180187deda104e24586d4549e95 SHA-256: 30552929f7b5494cb7692f36c154be99377e71f08158ebcacc9f27bf8430c122
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 point to disposable hosting services and redirector infrastructure. The heuristic firings indicate it is a link farm designed to direct users to malicious sites, with one URL specifically noted as a redirector for 'outlook for mac free 2011'. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/aws?utm_term=outlook+for+mac+free++2011 In PDF document text
    • https://gifetapajuloper.weebly.com/uploads/1/3/4/6/134682222/6ac64cc341151.pdfIn PDF document text
    • http://tupedesixavero.iblogger.org/38585058147.pdfIn PDF document text
    • https://cdn.sqhk.co/vujagefamig/zghhbKl/audio_spectrum_after_effects_plugin.pdfIn PDF document text
    • https://marotebage.weebly.com/uploads/1/3/4/7/134712984/4227368.pdfIn PDF document text
    • http://tryse.xyz/suzuzajafemaluvekofewegyqj2.pdfIn PDF document text
    • https://xigujevaw.weebly.com/uploads/1/3/4/7/134701692/8208202.pdfIn PDF document text
    • https://sipovabamekejo.weebly.com/uploads/1/3/5/3/135391609/632712c.pdfIn PDF document text
    • https://cdn.sqhk.co/mitugejaxel/cjdjghg/pocket_doc_girlfriends.pdfIn PDF document text
    • https://cdn.sqhk.co/goberirud/MRjjjjc/game_maker_2_free_download_full_version.pdfIn PDF document text
    • https://cdn.sqhk.co/retirifurew/dogdhg1/puzosoradenawopenedudusad.pdfIn PDF document text
    • https://cdn.sqhk.co/sulugedako/gjwjigc/webabasa.pdfIn PDF document text
    • https://duwiwobejul.weebly.com/uploads/1/3/2/7/132740292/6753306.pdfIn PDF document text
    • https://mogudigadoto.weebly.com/uploads/1/3/2/6/132695399/88df3711d80c191.pdfIn PDF document text
    • https://dikekivex.weebly.com/uploads/1/3/0/7/130775400/zifubunawekisakemodu.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
    • http://zezevefo.rf.gd/4065564211.pdfIn PDF document text
    • http://xaxibalese.epizy.com/powarudobevapuva.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_off00012795.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12795 4992 bytes
SHA-256: e97be3f96a6505bc41b5afa55e93a1e519896fc6e710aed962504fa7f1a550ff
font_01_sfnt_off0001389e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1389E 10880 bytes
SHA-256: 634d03be02fe96ad967bb04ee613e8126d8561f02521792a9919ce7f222b62c3
font_02_sfnt_off00015db9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15DB9 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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