Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fc844892b173057…

MALICIOUS

PDF

78.9 KB Created: 2021-02-24 03:45:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 4c10440b7bf6fe8d3c6ef5fb81962e21 SHA-1: 53ef173fd083feaaaf41f0ed656a3835e4e7ab85 SHA-256: 6fc844892b173057be0e08415605b59800e6ea3c1b624db2a2409fea74238111
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable hosting and known malicious redirectors, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of an attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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 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/strik?utm_term=insecure+in+love+reviews In PDF document text
    • https://cdn.sqhk.co/jifedibodo/1inWcEm/jefepila.pdfIn PDF document text
    • https://voxepobar.weebly.com/uploads/1/3/4/6/134668427/kesiwa_jatosarosi.pdfIn PDF document text
    • http://begetus11ppz.xyz/97020543864d78mh.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501656/normal_5ffae1217758b.pdfIn PDF document text
    • http://saleproducts.pro/wuxopixuteri05klv.pdfIn PDF document text
    • https://cdn.sqhk.co/xubulozirod/JDdjj2S/59017477939.pdfIn PDF document text
    • http://apeech.ru/16671861470n3v4o.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479240/normal_5ffa4e05d938f.pdfIn PDF document text
    • http://teasmall.space/diy_outdoor_wood_projects_free_plansf3tct.pdfIn PDF document text
    • https://nagalijas.weebly.com/uploads/1/3/1/3/131398542/zivodebopokamazi.pdfIn PDF document text
    • http://azorocheat5.xyz/364431836286fu36.pdfIn PDF document text
    • http://xsafak.com/lp_atonia_uterivszci.pdfIn PDF document text
    • http://pressit.fun/cairo_club_orchestrah7e0a.pdfIn PDF document text
    • https://sokowerifali.weebly.com/uploads/1/3/6/0/136053586/dixuwotulosanuke.pdfIn PDF document text
    • https://cdn.sqhk.co/wujozuzewed/34hhaYq/hexa_jigsaw_puzzle_mod_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/lixozimiz/5jcgezB/dodevisisoredosogifot.pdfIn PDF document text
    • https://lepekogiba.weebly.com/uploads/1/3/1/6/131637498/bugaruleden_zosig_xivokakekamo.pdfIn PDF document text
    • https://lulexabike.weebly.com/uploads/1/3/1/4/131407361/4f53d7c0dd.pdfIn PDF document text
    • http://stakingyfi.com/besumem6yre5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.daltonmaag.com/In 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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB76 4476 bytes
SHA-256: f1ae020041bab4ebc114570f8e7e735ae4d3de2511d6501eb5f87fee79e3a0ba
font_01_sfnt_off0000eaad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAAD 6300 bytes
SHA-256: 06107b40036eb44522f823784271e79533e1ff085286eeceb1724ba0c44e5511
font_02_sfnt_off0000fb32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB32 11072 bytes
SHA-256: 360206359581f035aaed257fe322dd9d9c35982e9354f415e8389304bbc1e853
font_03_sfnt_off00012006.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12006 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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