Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a5cc6ce162189ce…

MALICIOUS

PDF

79.3 KB Created: 2021-01-30 14:01:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: d077f26613684fcc874e83e128450b9e SHA-1: 127bfa695a8fc56a4fb3b674d9cf055137ff8dbc SHA-256: 5a5cc6ce162189ceb421983a3d96f0d9ade582425bf24b2305cbb9227563bd32
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file contains a large number of embedded links, many of which point to disposable hosting services and redirector infrastructure. The heuristic firings indicate that this PDF is designed to act as a link farm, likely to distribute malicious content or phish for credentials. The ML classifier and ClamAV detection strongly support its malicious nature, suggesting it is a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://crophysi.ru/aws?utm_term=inside+job+summary+pdf In PDF document text
    • https://lomameleni.weebly.com/uploads/1/3/4/5/134597964/watapujel_wimazefived_dadinu_jekudikexa.pdfIn PDF document text
    • https://vebuxevofarina.weebly.com/uploads/1/3/4/0/134013543/kenefejokezupaxer.pdfIn PDF document text
    • http://healsmall.space/48443395377jpa9b.pdfIn PDF document text
    • https://lepepapiminokuj.weebly.com/uploads/1/3/4/4/134493398/aff99c9d40cfb.pdfIn PDF document text
    • https://bosaralox.weebly.com/uploads/1/3/4/6/134608385/5593125.pdfIn PDF document text
    • https://regafuraseni.weebly.com/uploads/1/3/4/6/134663643/wosug.pdfIn PDF document text
    • https://kobokudebixisog.weebly.com/uploads/1/3/5/3/135390699/2590225.pdfIn PDF document text
    • https://pogiwubuwafax.weebly.com/uploads/1/3/0/7/130775808/rogol.pdfIn PDF document text
    • https://mijutadozas.weebly.com/uploads/1/3/4/5/134590660/7c6c3fde3c99.pdfIn PDF document text
    • https://gotizede.weebly.com/uploads/1/3/2/6/132695714/tuvasi-jonivodod-mapaweke-vebilepurojav.pdfIn PDF document text
    • https://tatefazaseg.weebly.com/uploads/1/3/4/0/134016926/sunomaxidove-ralipijitosam-tedebozib.pdfIn PDF document text
    • https://cdn.sqhk.co/leredupodeka/cggF4j7/formula_1_standings_by_year.pdfIn PDF document text
    • http://clebohets.xyz/vubamegunadubo95j0s.pdfIn PDF document text
    • https://cdn.sqhk.co/waxigapo/iiigwOT/belunadagimifovawukesiwe.pdfIn PDF document text
    • https://nebofubegifeso.weebly.com/uploads/1/3/1/4/131437549/lejeg-zagodoredoba.pdfIn PDF document text
    • https://jigugelelatowo.weebly.com/uploads/1/3/1/4/131437208/10cc725835e93.pdfIn PDF document text
    • http://xtina.online/74483695801ps5df.pdfIn PDF document text
    • https://vixagudidiw.weebly.com/uploads/1/3/0/7/130775505/4737e5d.pdfIn PDF document text
    • https://cdn.sqhk.co/juvokapo/Uejaiji/how_to_cook_a_potato_faster.pdfIn PDF document text
    • https://cdn.sqhk.co/juxajomuz/jEqWBia/717272050.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rozivirewim.rf.gd/excel_database_template_for_church_membership.pdfIn PDF document text
    • http://nawopezor.rf.gd/wutofifokaboj.pdfIn PDF document text
    • http://xizesewidepo.epizy.com/define_bovine_spongiform_encephalopathy.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_off0000f84b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF84B 5412 bytes
SHA-256: d49d6de26ab9aa9b3d7237112d9cb0137ca67aebc8b35931909b0bc3bcebb027
font_01_sfnt_off00010a99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A99 10784 bytes
SHA-256: 7099cce2895f18e2f7244760a03c72c102033176ad05564e60268e79d5fb986e