Malicious PDF — malware analysis report

Static analysis result for SHA-256 1352b588b8ee7369…

MALICIOUS

PDF

68.3 KB Created: 2021-02-21 13:26:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 1fdb10ee8aba7927cb94ce9c4bb78ce3 SHA-1: 1f3b77f8655e928bf9c534295f67f9f2f60a99ed SHA-256: 1352b588b8ee736917d01db74de4aaf6aa118219b5bf189636b99c33746841aa
244 Risk Score

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://crophysi.ru/wix?keyword=ib+physics+semester+1+final+review+packet In PDF document text
    • https://zevoxonigex.weebly.com/uploads/1/3/5/3/135300088/kigipos_vepadiwasapo.pdfIn PDF document text
    • http://adv-workshop.site/413992904394oilp.pdfIn PDF document text
    • http://nout-prokat.website/vimoxodisatorijhuu0x.pdfIn PDF document text
    • http://shoop-fm.ru/disovi8vkml.pdfIn PDF document text
    • https://nubipudovolena.weebly.com/uploads/1/3/4/0/134012318/kofixebaturum.pdfIn PDF document text
    • https://riwusivi.weebly.com/uploads/1/3/4/9/134900433/7225036.pdfIn PDF document text
    • http://vashastrahovka24.ru/63039169898e2mtg.pdfIn PDF document text
    • http://cccckkkkkdd.space/sukifut2bv8b.pdfIn PDF document text
    • https://sinuvuliwazima.weebly.com/uploads/1/3/1/8/131871572/d1fbe504.pdfIn PDF document text
    • https://mitiguranam.weebly.com/uploads/1/3/4/4/134456526/594717b06.pdfIn PDF document text
    • https://zomimodobi.weebly.com/uploads/1/3/0/7/130739583/9222a70f3.pdfIn PDF document text
    • http://demetifig.22web.org/43845084085.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tatovod.epizy.com/playerunknown_s_battlegrounds_free_for_windows_7.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_off0000c433.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC433 5700 bytes
SHA-256: 5fe535cf1aa24753e054d5f6b8dce82d8a6cde31fbc40748deac2c1e1715c84a
font_01_sfnt_off0000d788.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD788 1864 bytes
SHA-256: 1fda7262b9c322238461688d7b24ad83ee7204aef4f414443ce82fa7efbd087d
font_02_sfnt_off0000e095.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE095 10408 bytes
SHA-256: 58fd62f27b1ca20eda5baf6be8c8ae2e2a307a09831c88f432579114843a9abf