Malicious PDF — malware analysis report

Static analysis result for SHA-256 44605d352055dc73…

MALICIOUS

PDF

47.4 KB Created: 2020-11-03 13:07:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 22091abc4cc693be96fc3b10afc6c295 SHA-1: 64c7d4699dcae0901535a1861c16d57e1a2bc3c4 SHA-256: 44605d352055dc7315f20a02cc029972d4c733f663ff1cce548b9776090e3f73
154 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to potentially malicious redirectors or link farms, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM heuristics. The document body text and embedded URLs suggest a lure related to downloading a 'pokemon go apk latest version', which redirects to a malicious URL. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://gettraff.ru/aws?keyword=pokemon+go+apk+latest+version+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365599/normal_5f8ef5bdec29c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367278/normal_5f8f5c8d30b15.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369796/normal_5f93cebce8199.pdfIn PDF document text
    • https://fidegobopoj.weebly.com/uploads/1/3/2/8/132815019/59181733d4337.pdfIn PDF document text
    • https://ditiwudo.weebly.com/uploads/1/3/1/4/131452947/xokobew_mavefubowubijus_rebuniwumawanom_vufisojufekaj.pdfIn PDF document text
    • https://tanifovekula.weebly.com/uploads/1/3/1/3/131379991/6959900.pdfIn PDF document text
    • https://pevugubak.weebly.com/uploads/1/3/2/7/132740457/papimi-nefewekapojerof-vorur.pdfIn PDF document text
    • https://riwisasivituw.weebly.com/uploads/1/3/1/0/131070703/146d032f56d235.pdfIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a172a719-8b3c-45ab-85c0-60d35c50e679/3375950857.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91039479-2f25-461c-b686-ce7da897474e/80076576774.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7632f6a-b787-4915-9699-2734033659e9/70772378707.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e42251b-ab3d-4219-aced-90bc47ddd1aa/dabigedizu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ec73f28-1b3b-4a86-beb3-1a46ef570ea8/22581934048.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/297d30f4-3041-4aca-92f4-17cd0505a3c3/22183474126.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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000077aa.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x77AA 6492 bytes
SHA-256: 68f321224d9dadfbcd4d7fb16c75693781b54a32f80ec592a8ce7b7bc046e878
font_00_sfnt_off000064fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64FC 5496 bytes
SHA-256: 4d0e3bb337901a143fd1dc312473b94a648153b0327f812a6e9ca6ede1aff039
font_02_sfnt_off000088b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88B3 11300 bytes
SHA-256: 46638d2130c9d3e1d875a3213426666ae88177a390e9bd8bc52807758c5bb175

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