Malicious PDF — malware analysis report

Static analysis result for SHA-256 456648f39c3a2e41…

MALICIOUS

PDF

83.3 KB Created: 2021-02-14 20:55:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 4b7e95cc56332e532977ba91341d05a7 SHA-1: ac667ad0162bfb52ea48a826f893ec6bf5b2a02e SHA-256: 456648f39c3a2e41a534369b8aa7246519ce849247ceef8f9dcd389fd08712fa
214 Risk Score

Malware Insights

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

The PDF contains multiple links to external resources, including a known malicious redirector and a large link farm of other PDFs. The embedded content suggests a lure for pirated music downloads, which is a common phishing tactic. The ClamAV detection and ML classifier further support the malicious nature of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://crophysi.ru/wix?keyword=daft+punk+random+access+memories+mp3+free+download In PDF document text
    • https://niritopep.weebly.com/uploads/1/3/4/6/134634222/pililin-samogoxukusa.pdfIn PDF document text
    • https://bozixezexa.weebly.com/uploads/1/3/4/8/134861503/datawik.pdfIn PDF document text
    • https://bivitomelonex.weebly.com/uploads/1/3/4/4/134491730/kuzogeju-kuzogopolux.pdfIn PDF document text
    • https://fikifiwokadekaw.weebly.com/uploads/1/3/4/5/134585034/kuvijuvatelasoj.pdfIn PDF document text
    • https://femovoba.weebly.com/uploads/1/3/0/7/130775826/4850806.pdfIn PDF document text
    • https://paratokoke.weebly.com/uploads/1/3/0/7/130739311/zesena.pdfIn PDF document text
    • https://turezizudowan.weebly.com/uploads/1/3/1/6/131606253/f005d.pdfIn PDF document text
    • https://lilalosemojuwo.weebly.com/uploads/1/3/0/8/130814601/55af14d.pdfIn PDF document text
    • http://xteenware.online/xupasatafiliforur5p6u2.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
    • https://s3.amazonaws.com/rodiligarexo/lutanoponikuxatotup.pdfIn PDF document text
    • https://s3.amazonaws.com/bisegilupuf/consequentialist_ethical_theories.pdfIn PDF document text
    • https://s3.amazonaws.com/fazujo/spiritual_meaning_of_names.pdfIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/revejutalewekewiboja.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_off0000fbcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBCB 5500 bytes
SHA-256: 6087dfac909358f174970b573edeb0634828366920b9e35cb5dec1fbe2ff169b
font_01_sfnt_off00010e7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E7D 10344 bytes
SHA-256: f5e6176ff6ed8adf20b47996ba2931e991a42246b4e20c3a8895958b40cda8f4
font_02_sfnt_off000131c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131C8 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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