Malicious PDF — malware analysis report

Static analysis result for SHA-256 b62817a5f9a252ba…

MALICIOUS

PDF

78.0 KB Created: 2021-02-17 08:47:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: d55d0fa9827bb72953ddf9efb804ea16 SHA-1: eb79b251de99746a454beab360c46ee20cde61c0 SHA-256: b62817a5f9a252ba607a7e395dfbd564b3467f2aac715799517bf5e0df9f6f11
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://baarspo.ru/strik?utm_term=el+pollo+loco+double+chicken+salad+calories PDF link annotation
    • https://fekugutupufug.weebly.com/uploads/1/3/4/8/134876907/tabis_vokuvep.pdfIn PDF document text
    • http://legexenajulejof.iblogger.org/22976019521.pdfIn PDF document text
    • http://onatural.space/50014174265usy26.pdfIn PDF document text
    • http://gutprod.xyz/vukexoohztx.pdfIn PDF document text
    • http://palejep.22web.org/basecamp_3_to_do_list_template.pdfIn PDF document text
    • http://edalovert.xyz/81747221137da521.pdfIn PDF document text
    • http://thelandofbadideas.com/moxalitegoxewuxoveriqb771.pdfIn PDF document text
    • http://pakamid.22web.org/diagramme_de_gantt_google_sheet.pdfIn PDF document text
    • http://afracheat6.xyz/livujobup8kwet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421613/normal_6017467e660df.pdfIn PDF document text
    • http://filanion.online/coffee_lake_r_hackintosh_vanilla_desktop_guidefpu84.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457620/normal_601558bd19d3f.pdfIn PDF document text
    • http://italdom.fun/kosatuxolibs7fz7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386851/normal_5ffb076626e1e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366344/normal_5ff1bdb162ad8.pdfIn PDF document text
    • http://sodahub.pro/lixogesuvabuwigijazebasoypgdm.pdfIn PDF document text
    • https://xedowekogo.weebly.com/uploads/1/3/4/6/134609622/xopadimixofo.pdfIn PDF document text
    • http://rusakova.space/charmed_kampf_der_titanen_castws6tc.pdfIn PDF document text
    • https://zabidikigez.weebly.com/uploads/1/3/4/5/134594795/zegelejaxejatude.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://ranedugipepin.epizy.com/autocad_gratis_2014.pdfIn PDF document text
    • http://fixelelediv.epizy.com/facts_and_figures_1_answer_key.pdfIn PDF document text
    • http://voxinuxo.epizy.com/dotolixadawejegosone.pdfIn PDF document text
    • http://watimesuw.rf.gd/guided_reading_activity_8-_1_world_geography.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_off0000e584.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE584 5124 bytes
SHA-256: 1f3e761215b52e7fd16a869e26ae584b4c406d49f7078a8b790c8b1f255f7c61
font_01_sfnt_off0000f6c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C7 11152 bytes
SHA-256: 4e69cecbb2ef45a11667a6a03a018b80752526958b0ecbc316f7af3b870378ed
font_02_sfnt_off00011c09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C09 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176