Malicious PDF — malware analysis report

Static analysis result for SHA-256 440b52dea1f4e6c5…

MALICIOUS

PDF

68.4 KB Created: 2021-02-15 13:36:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 196f589ec975254fbe3e71e490baf5b0 SHA-1: f960a217dbaa5ad08c03c6e4d92fe1a220281e3d SHA-256: 440b52dea1f4e6c55360a32a6c0fe1f0114f4dcae79819eb6bfee007af715f47
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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=davis%2527s+canadian+drug+guide+for+nurses+17th+edition In PDF document text
    • https://cdn.sqhk.co/vozeseseber/iHhbS0y/tidituzivojanubumawakopil.pdfIn PDF document text
    • https://cdn.sqhk.co/tajudozizif/ihbLicw/swing_loops_grapple_hook_race.pdfIn PDF document text
    • http://pikogoxo.iblogger.org/multiplying_dividing_rational_numbers_worksheet.pdfIn PDF document text
    • https://cdn.sqhk.co/vafizolubev/bhdWihf/tazowofirolemenubaja.pdfIn PDF document text
    • https://pewarefat.weebly.com/uploads/1/3/4/3/134361746/niwifonofixata_vowibosika_gadipalum_fidurono.pdfIn PDF document text
    • https://vilewojux.weebly.com/uploads/1/3/0/8/130874250/f5f14d.pdfIn PDF document text
    • https://cdn.sqhk.co/tatidukigag/g3geo0B/17157205771.pdfIn PDF document text
    • https://cdn.sqhk.co/fuwunikuneg/iiBjcgj/jefonixezotokenoxalu.pdfIn PDF document text
    • https://cdn.sqhk.co/bozutebux/dfiaqhg/75310046294.pdfIn PDF document text
    • https://diwimiwiwomenen.weebly.com/uploads/1/3/0/9/130969795/xurofejos.pdfIn PDF document text
    • https://nudatisuwirok.weebly.com/uploads/1/3/1/3/131384101/638474.pdfIn PDF document text
    • https://cdn.sqhk.co/dutaxato/fELz00q/zajubuzozekanumef.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lukagaxa.rf.gd/50_most_common_adjectives_in_english.pdfIn PDF document text
    • http://xesesopid.rf.gd/biremepunatutufebun.pdfIn PDF document text
    • https://s3.amazonaws.com/wetevali/26412407545.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_off0000cd15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD15 5476 bytes
SHA-256: 4b0b8c2b457c1dbd138fdb5e60e7af743bbd1e598b742a07cda3b7fd920b0f94
font_01_sfnt_off0000dfd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFD0 10860 bytes
SHA-256: 67b3bf5cf2103032cb29d0f2a1cd26252e4a08dac67c13523a497ee3c5c9414b

Open this report in the interactive analyzer, or submit your own file for analysis.